Malicious PDF — malware analysis report

Static analysis result for SHA-256 14657af34820b00a…

MALICIOUS

PDF

104.5 KB Created: 2021-03-30 16:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66c47e2e95d5f7ab66a53819f6424f7e SHA-1: d3ce7517c1788d6d4ed10d93aa2e55b5da0b4c39 SHA-256: 14657af34820b00a864d0d6a853a5f79cd2e5337640e03f9be93336a1afdd69d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or SEO poisoning attempt. ClamAV and ML classifiers also flagged the file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF structure suggest it's designed to redirect users to malicious sites, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=shinmai+maou+no+testament+departures+dub
    • http://zoosalon.org/genetica_livrodvpk9.pdf
    • http://fortuneo-enligne.com/chapter_8_chemistry_assessment_answers41m3h.pdf
    • https://cdn.sqhk.co/rorezina/jicgjhc/wusura.pdf
    • http://uablog.website/fuzududafarojia3pn8.pdf
    • https://cdn.sqhk.co/wevavagu/TThfoje/vuginozeregejidipovid.pdf
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdf
    • https://cdn.sqhk.co/rorajakura/hiwgjkj/82842300879.pdf
    • http://obschee.xyz/gopuxixemutopejnw0yr.pdf
    • https://cdn.sqhk.co/melipetoluf/gjH8jbg/radeva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b9768d3b-7549-4c14-bc78-07fd0ef80e36/can_jane_the_virgin_speak_spanish.pdf
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_e52e4272b04f4bf795b5dd3764f46ab4.pdf?index=true
    • https://s3.amazonaws.com/gazivemon/gokugatawuvezukirag.pdf
    • https://s3.amazonaws.com/dutimajizowa/play_store_shows_pending_always.pdf
    • https://uploads.strikinglycdn.com/files/f07213c7-95e9-4719-8f6f-029636243c2b/highschool_dxd_light_novel_english_download.pdf
    • https://d6a293f2-6876-493d-91b7-c13182b05023.filesusr.com/ugd/bcaa7e_b869fa08074d48fcbc5991c7e1beb3e7.pdf?index=true
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_c8df0c41eea944c188e54424b41b97bd.pdf?index=true
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_843137ce72804feab34a428be5e122b3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/81d0d048-6f85-4e1c-bc8e-26be6c361b25/vulinexotepifi.pdf
    • https://uploads.strikinglycdn.com/files/96a3121a-27be-4fb1-9cfa-ac9f7beda924/31776536752.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011670.bin
21addaca32d4dbce3b21d327033a89579808c3a0346b43758db315f52dfc30c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11670 21656 bytes
font_01_sfnt_off00015ac5.bin
de4d5c4e761811b2df1f49dcb31158f1495dc6cf89164f8f381ab6230c28f261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC5 5412 bytes
font_02_sfnt_off00016cf0.bin
ee08bbec000da37655ab061858429fc70c0bff8b8b2b45a3c060ed957b661868		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CF0 11964 bytes

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