Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6f75fe34b55818…

MALICIOUS

PDF

79.4 KB Created: 2021-04-21 12:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: beb72a4f033c575f2e68e37456a97971 SHA-1: 8e277defc8e16bc34479a0b321992c5b3e2e2d06 SHA-256: 9a6f75fe34b558183f4b311293bcf7124842b18ea3ab92ce022b9e8ad1f9110b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/strik?utm_term=is+honest+brand+safe+for+pregnancy PDF link annotation
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/756f38d620c4.pdfIn PDF document text
    • https://pawusavexamase.weebly.com/uploads/1/3/0/8/130813618/redewufirenu_xuzelime.pdfIn PDF document text
    • https://kulaxewanugig.weebly.com/uploads/1/3/1/3/131384484/vaporaje.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/458420.pdfIn PDF document text
    • http://dezirutumevolu.iblogger.org/67238790620.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/9f3f9c0fcccc443.pdfIn PDF document text
    • https://rigivopamakor.weebly.com/uploads/1/3/4/8/134869382/823367.pdfIn PDF document text
    • http://card2card.live/devil_may_cry_weaponsp78gr.pdfIn PDF document text
    • http://giocodigital.fun/21475937917xq5yf.pdfIn PDF document text
    • https://givetowa.weebly.com/uploads/1/3/1/4/131437183/70dffd355e3f.pdfIn PDF document text
    • http://sayseedokg.com/avakin_life_hack_apk_happymod0u0t2.pdfIn PDF document text
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/1875421.pdfIn PDF document text
    • https://tamosumedov.weebly.com/uploads/1/3/4/0/134017363/molegipepij-gulofar.pdfIn PDF document text
    • https://zajefogana.weebly.com/uploads/1/3/1/4/131407312/8993715.pdfIn PDF document text
    • http://supportcopyright.net/pdf_to_word_converter_free_download_software_full_version0917s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9e9203d9-9f5b-42f2-a849-05e42d741f90.filesusr.com/ugd/3527d5_bcc1adcfdfa54270ba5bbef1d99a7f58.pdf?index=trueIn PDF document text
    • https://2065f6f1-29fb-48ac-a230-4f4ab2d4b746.filesusr.com/ugd/b62953_03afc04a0f564406ac13dad7a70fc5c8.pdf?index=trueIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_7b3a88c528114357a2dece8c01245c3f.pdf?index=trueIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_58ac634db9c24803965367c6da7e1d50.pdf?index=trueIn PDF document text
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_381be5ea3d4244fdab86e52513f0c21c.pdf?index=trueIn PDF document text
    • http://bodapefazit.rf.gd/general_laboratory_safety_rules_and_guidelines.pdfIn PDF document text
    • https://ad9f1622-e3b7-49db-bfef-326c48fb2104.filesusr.com/ugd/a467d2_9d2fd063676b4d998d8030cfafbc9b76.pdf?index=trueIn PDF document text
    • https://2ce49c0c-752a-49d0-a831-a69229ee2afe.filesusr.com/ugd/6e9521_4760086080c54165a4a428a80616adc6.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 5564 bytes
SHA-256: fa6c9f209c8bf7d839d631ca1751b8ab5a6e12ab9f9135e4a0135edcf8919cb4
font_01_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 2344 bytes
SHA-256: 3e6c323c9e67c04efddc5e9d761c360b2a452c22c2c4ae0ae2381f21a2f52bda
font_02_sfnt_off00010c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C32 10552 bytes
SHA-256: e10de6877180d9f85c4d4b73a594a50602e0db44d39befc5069f0452d750c114