Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dee424d7c695c2a…

MALICIOUS

PDF

100.0 KB Created: 2021-03-18 02:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fd9560bab01a4ea5a143814367c49ac0 SHA-1: c1d9a6b09e350786c619e7d2bf0cd2c040f6123b SHA-256: 0dee424d7c695c2aae2701fe4ccb2387c8782cfd959722fe8a5a460d3abbf09d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains or using UTM parameters, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/123?utm_term=graphing+linear+equations+with+two+variables+worksheets PDF link annotation
    • http://mybestchan.online/scott_cunningham_wicca_in_the_kitchencsfzv.pdfIn PDF document text
    • https://zibakuponitek.weebly.com/uploads/1/3/5/3/135303957/sotekomet_nejuxunujesi_lesezaguxifex.pdfIn PDF document text
    • http://serviceforyou.site/missing_411_epub_downloadkxpp4.pdfIn PDF document text
    • http://top-odejda.com/what_are_the_7_elements_of_a_story_and_their_meaningp3x6u.pdfIn PDF document text
    • http://mini-cam2.club/amelia_bedelia_bookworm_read_aloudgvwa4.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/f324e.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/math_fun_worksheets_for_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8d1b77-aedf-4f9e-9f26-841331d958c6/pink_dye_pregnancy_test_evap_line.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/what_is_an_example_of_a_symbol_in_romeo_and_juliet_act_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe01778-9e2e-4792-9b21-3aecc529614e/kuvujapajosibegubazufif.pdfIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_41627180bd884eb0b4afa3e3c00a1341.pdf?index=trueIn PDF document text
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_f2d9690a56254aeb8d9fbfdc2f58ec24.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2972efb7-8375-4286-89e6-0bca0b76c2d9/33062780842.pdfIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_5c9c5acb01644b86bae9293bcd2c9774.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce5491b-1728-4a73-b3f2-e92f8169cd68/26792791395.pdfIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_8930f013a0cf4e9586368e520696bc48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f56551e-e25a-4f05-8d3e-b00f40f5b359/philips_dvd_universal_remote_app.pdfIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_27912d9f1bfc47818d67d08066cfe149.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7523bf-61a3-4813-ae40-bce34868a9ef/7218097319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7a0134-b474-481f-a59b-23a727eba6a3/tizidaganumuzeluvat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/874a1dd2-6293-481d-9654-ef839d190857/3399170586.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000146a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x146A2 19672 bytes
SHA-256: 9873d86c77455b191b5f93709a9d91bdef6e531113905035993c364abe815d83
font_00_sfnt_off0001051d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051D 5596 bytes
SHA-256: 275d0217fa63050b89e5c2c67405f99e25f8a3f6f76db16e6686d0929ceb1416
font_01_sfnt_off0001182a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182A 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off0001238e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238E 10192 bytes
SHA-256: 67e7b5d55965cf2e9858f3159f30e50ede46f22daff14bbdf4b1a34c12fb2937

Open this report in the interactive analyzer, or submit your own file for analysis.