Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e55a6946d33108e…

MALICIOUS

PDF

78.6 KB Created: 2021-05-05 18:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9f1a057aa7022cfde9d6a43108515f12 SHA-1: 7297978bde5607cdbbb440fc306362f748e8b1c2 SHA-256: 6e55a6946d33108ed63991f057217b31afb447a7edb4d376a3dadf862e6f7e05
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The '30 day lean body challenge' lure is likely a pretext to drive traffic to malicious or phishing sites. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=30+day+lean+body+challenge PDF link annotation
    • https://cdn.sqhk.co/rasepotobami/ThbORgd/dragon_kingdom_of_wrenly.pdfIn PDF document text
    • http://xokijaxano.medianewsonline.com/business_basics_book.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/jajowepeboz_pelotinaf.pdfIn PDF document text
    • https://pexasuwen.weebly.com/uploads/1/3/4/5/134593650/lesujutowafi.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/ifhe7ia/bucket_list_things_to_do_in_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/jTzzheN/gutamakatizejefutojoz.pdfIn PDF document text
    • https://xovatofenutadom.weebly.com/uploads/1/3/4/5/134511467/pubolokawoxibivu.pdfIn PDF document text
    • https://lomagifotoji.weebly.com/uploads/1/3/0/8/130814873/3570465.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/hbiiMjg/39842097478.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/Chfgjhf/53235580980.pdfIn PDF document text
    • https://cdn.sqhk.co/dupetodim/ogjghOk/zaporagifatebaroz.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/iavdwFk/what_does_bombastic_antonym.pdfIn PDF document text
    • https://gotanizanoga.weebly.com/uploads/1/3/5/3/135332446/741c5f3ad1295.pdfIn PDF document text
    • http://lorezagosuvese.scienceontheweb.net/98471228953.pdfIn PDF document text
    • https://cdn.sqhk.co/legezuseg/ujeFxHe/83980704860.pdfIn PDF document text
    • https://kiwazavu.weebly.com/uploads/1/3/0/7/130776346/6058208.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/ibfeij9/voice_recorder_free_download_mac.pdfIn PDF document text
    • https://vipodamuroxadug.weebly.com/uploads/1/3/4/6/134667743/getituxigus_jeradesixowovox_xoseduvitew_kenijud.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/vUzaii6/fios_tv_app_apple_airplay.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/jarirotexab/72779021254.pdfIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/repazekujevixukolo.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/baradene_summer_uniform.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_off0000f606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF606 5380 bytes
SHA-256: 26314b46e9fede13ce2d48df06abb8480dbbf9631af91e486cdabbbe88c0f69b
font_01_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 10384 bytes
SHA-256: 687ed53ab191a8514a4192f49620cfaf5a70b136ab1aa14146889f8ad8daf009