Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc2f9045db6d246…

MALICIOUS

PDF

177.5 KB Created: 2021-05-11 12:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 14451546c87584b2e8c484df6749cfe3 SHA-1: 15bb57655cf4d5bfa0535249f2658e55a93c1d63 SHA-256: bcc2f9045db6d24600fb45fed3d5f9cc11393294e72524934d144af0b6c81abe
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights its nature as a link farm on disposable hosting, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9378

Heuristics 5

  • 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 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://golowaki.ru/strik?utm_term=us+stock+market+futures+marketwatch PDF link annotation
    • http://front-glass.space/96613996093ndbl0.pdfIn PDF document text
    • https://tesomibafakaxag.weebly.com/uploads/1/3/4/3/134368706/gumuzivenode.pdfIn PDF document text
    • http://evakuator-uga.ru/74730977891cs7xk.pdfIn PDF document text
    • https://pusotovoxidelo.weebly.com/uploads/1/3/1/6/131637553/xitiridonudobuk.pdfIn PDF document text
    • http://reznitskygallery.com/social_finance_salariesezvcr.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/materias_de_histria_que_caem_no_enem.pdfIn PDF document text
    • https://kilavolofijon.weebly.com/uploads/1/3/1/1/131164174/xuwutakeg_famivixanopoluv.pdfIn PDF document text
    • https://xizuzesujebowu.weebly.com/uploads/1/3/4/6/134666185/7f798.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/list_of_irregular_nouns_and_their_plural_form.pdfIn PDF document text
    • http://vigastlens.xyz/core_java_interview_questions_for_junior_developerstdkz4.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/general_knowledge_questions_and_answers_about_pakistan_in_english.pdfIn PDF document text
    • http://shoop-fl.ru/happy_birthday_new_punjabi_song_djpunjab9b8rl.pdfIn PDF document text
    • https://betutinixe.weebly.com/uploads/1/3/4/4/134481053/zeluwuwixanefit.pdfIn PDF document text
    • https://bexokibuki.weebly.com/uploads/1/3/2/3/132302940/5050256.pdfIn PDF document text
    • https://kedefakoriwo.weebly.com/uploads/1/3/1/1/131164231/11664f8bbd.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/20566990212xxhab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siberasule.rf.gd/6806897599.pdfIn PDF document text
    • http://pudolajuji.atwebpages.com/centralized_vs_decentralized_decision_making.pdfIn PDF document text
    • http://sexizaju.rf.gd/ccna_security_or_comptia_security.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e734.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE734 133052 bytes
SHA-256: ed2b66c5a6230122e1d0528d1bf65efc8e4788026eeec03ff26e42de1c0275d3
font_01_sfnt_off00027141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27141 5236 bytes
SHA-256: 861d5c46bbbcec9af48adeaee4469051402a339646ca369249f2db4891187400
font_02_sfnt_off000282ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x282FF 11220 bytes
SHA-256: 9da230c36a1f2d99e2b664264a01598552a3dd904e3d6b5648d72ff454917f55
font_03_sfnt_off0002a888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A888 17740 bytes
SHA-256: 5efc8c04aeca33d5b5bf01798edc7c919d49cef3491936c9ff3e956311893b6f

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