Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2792c29c1bf16d…

MALICIOUS

PDF

76.2 KB Created: 2021-03-13 23:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8248747a167354d70efca3121eb79e05 SHA-1: 393fa415c891a4c797e67d85af4ce78493a76928 SHA-256: 8e2792c29c1bf16d714e3c50c0e8ffd8a4dc9abca9fb5058e50b58835c4fdcad
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a suspicious domain that appears to be part of a link farm or phishing operation. ClamAV and ML classifiers have identified this file as malicious, specifically flagging it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Cours anglais d affaire gratuit pdf', suggesting a lure to attract users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://xezojetit.ru/award?keyword=cours+anglais+d+affaire+gratuit+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408188/normal_603f5ca2584fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_602c047fd7562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_60111921cec64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484821/normal_6008b62452f8f.pdfIn PDF document text
    • https://sutesesa.weebly.com/uploads/1/3/4/8/134871168/xurazawukizodo.pdfIn PDF document text
    • https://wojamoze.weebly.com/uploads/1/3/4/4/134479738/593ad0ca3cb2.pdfIn PDF document text
    • https://bakasilamor.weebly.com/uploads/1/3/1/4/131407315/kokomolimugajapeto.pdfIn PDF document text
    • https://nidewusojob.weebly.com/uploads/1/3/1/4/131438556/1788347.pdfIn PDF document text
    • https://wokusozevopiwaj.weebly.com/uploads/1/3/4/3/134381386/5974015.pdfIn PDF document text
    • https://jokikisiva.weebly.com/uploads/1/3/0/8/130873994/terupa_lagowokof.pdfIn PDF document text
    • https://gegadibiliwo.weebly.com/uploads/1/3/1/8/131871883/kemewebuxuner.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/aml_treatment_guidelines_uk.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_76636a497a33462db86a5973298b4277.pdf?index=trueIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_e29acd7dc23a4bdab0251f11453d94bc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/contraptions_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/forma_arquitectonica_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/entrepreneurship_theory_and_practice_raj_shankar.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/vixinufibige.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/lajovugufamudeworal.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_5303c72f81e84a2882f573758a48a394.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujapu/jmeter_performance_testing_tutorial_for_beginners.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_9aae5375d6764f15bb1c98c31d8d7015.pdf?index=trueIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_8801e83c8e9743e0ae1c3d46bfbd55e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/nkjv_bible_online.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 5112 bytes
SHA-256: a7487a34e8aaa93943cef47ffe67223a749744382bddcc102071b561cc766ad3
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 11504 bytes
SHA-256: 6d2cef3cc64072b599e64d06341414a15ba826d51564b4eecf3774d18df4eacf

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