Malicious PDF — malware analysis report

Static analysis result for SHA-256 319253b54af4b736…

MALICIOUS

PDF

106.1 KB Created: 2021-03-16 10:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9b260b4de4f62ea055bdd4be7e56ce9b SHA-1: 3e1069977353a62ade508a5a217b91f86238c3dd SHA-256: 319253b54af4b736d14738ab4c68fc20d98683945a26635b9cb066e66cb7953f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The presence of the URL 'https://soxebez.ru/123?utm_term=baal+veer+episode+1111++3gp' suggests a potential lure related to media content. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest malicious intent related to SEO manipulation or directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/123?utm_term=baal+veer+episode+1111++3gp PDF link annotation
    • https://kovirelumen.weebly.com/uploads/1/3/0/8/130873776/pazawoxugujawo-tifawifofite-mobem.pdfIn PDF document text
    • https://cdn.sqhk.co/tatolodam/ighbTjc/best_decks_for_clan_wars_2.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/ph03Kij/download_hovercraft_takedown_mod_apk_1._5_7.pdfIn PDF document text
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/8525738.pdfIn PDF document text
    • https://cdn.sqhk.co/rodoruwuwab/hahchaZ/34226715172.pdfIn PDF document text
    • https://remofixar.weebly.com/uploads/1/3/0/7/130776049/878c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/vurikef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249ed256-671f-484d-8e1c-e657e9449ffc/19821260920.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/rebikurukifekaman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a7dd6f-e68a-498b-93e4-baee578897b5/9809367807.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_d835b1d5a4d7423dbb4d66d89aef3f7b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/slow_blizzard_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd86c478-67c1-4f8f-8bc2-536e88c25d48/big_blue_party_speaker_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00844a97-a019-439e-951c-ebe9efe6ce84/9544463454.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/dust_jacket_template_indesign.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_7233713e4d3241dcb77192c2fadbb703.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93b9752a-46ff-49c2-b3a8-eab982b00d52/88036919959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28397d65-4223-4e29-a111-ed702642232d/fegemumipameseg.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_de9fd4e133ae4f9a9f4dd4215d250f23.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/netinuwa/spanish_greetings_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000dafe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDAFE 13248 bytes
SHA-256: 0be42169288be4e27337f554ed0216d6753f3f0abbb55941ab7ca1d3b3cc0caf
font_01_sfnt_off0000fffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFD 3756 bytes
SHA-256: 3aca030bbd41b1cc442eed9f44d7b646ee06f73004eb1038e8ecde70c0a7a454
font_02_sfnt_off00010d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6A 5056 bytes
SHA-256: 675b6900bba2f5804e6a39737a8027b90c8a2275358cafd698cf4c5a2eba4c1a
font_03_sfnt_off00011eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB2 8736 bytes
SHA-256: 30156578ca59d77efc5034490e85cbbc6b1bf2dfb332bb58d00a18412f31753a
font_04_sfnt_off00012fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCB 4672 bytes
SHA-256: e41725bc77b79d1b940cc447080b6aa7f2d1ec09498939bd243a41140f73a0b4
font_05_sfnt_off00013c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C50 11752 bytes
SHA-256: 73242627d93b90e4b849e91d762b982869f687a4ae3ce30474a015c3759fabe4
font_06_sfnt_off000162e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162E0 16504 bytes
SHA-256: ec3903c5530229632b31a8ec5b4bf2e994ff3176deed9418b662b51ff132e9a3
font_07_sfnt_off00017996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17996 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_08_sfnt_off00018759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18759 6216 bytes
SHA-256: e51b4370939e7712f2789b463beda148bb929a2fbc1df5acc40a78dd334c0ab0

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