Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66e07bc030b2f72…

MALICIOUS

PDF

101.5 KB Created: 2021-04-01 23:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e0dc8b807410721e540b31db18c2657 SHA-1: 0e865df132308c843571d53b85874c0042b172ce SHA-256: a66e07bc030b2f72f3b64076098510a55f91c6056acaaf7282be611339a8f97d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier assigned a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to 'Tv guide lansing mi'. No scripts were extracted from this sample, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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=tv+guide+lansing+mi
    • http://tetizeniwa.mypressonline.com/44491250883.pdf
    • http://rawoxaxevog.mygamesonline.org/10031836425.pdf
    • https://cdn-cms.f-static.net/uploads/4388163/normal_6011d61682b06.pdf
    • http://nowukusox.mypressonline.com/waxofagezanix.pdf
    • http://muvepifare.mygamesonline.org/sujet_brevet_2020_amerique_du_nord.pdf
    • http://pifadopagel.scienceontheweb.net/exercicios_gimnospermas_e_angiospermas.pdf
    • http://rivozuzeno.mywebcommunity.org/husqvarna_450_chainsaw_carburetor_cleaning.pdf
    • https://cdn-cms.f-static.net/uploads/4393625/normal_602713b517c65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kelageketisefuv/vezogemudusowoke.pdf
    • https://s3.amazonaws.com/jeworurowam/gudovetudavilam.pdf
    • https://s3.amazonaws.com/dosipive/36777590418.pdf
    • https://s3.amazonaws.com/vesubodufisi/free_medicine_books_website.pdf
    • https://s3.amazonaws.com/tubupejevomo/android_wear_app.pdf
    • https://s3.amazonaws.com/wewiro/is_ninja_a_good_blender_brand.pdf
    • https://s3.amazonaws.com/nilafafakem/kublai_khan_southaven_mississippi.pdf
    • https://s3.amazonaws.com/labitajaxatufib/kisuretusizejasegibur.pdf
    • https://s3.amazonaws.com/wulagisi/xufatewabarexuwijajupit.pdf
    • https://s3.amazonaws.com/pazovugal/kovanizuludakonejav.pdf
    • https://s3.amazonaws.com/gajakelegeza/the_aeneid_summary_book_8.pdf
    • https://s3.amazonaws.com/lovetijif/50592798878.pdf
    • https://s3.amazonaws.com/makumapikeze/suwaferufoxexofuxa.pdf
    • https://s3.amazonaws.com/jenagubadopi/acdsee_free_windows_7_64_bit.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f05.bin
ab8ef57cfd035e92daaaa8223df1f550708ba07ca211c33a2d8ca472b1ebd17b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F05 5056 bytes
font_01_sfnt_off00016032.bin
5545ad39f1dcf616ec85ed5d7009b851a7fce9a55c7e1a373d7d6c857bfd8e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16032 11320 bytes

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