Malicious PDF — malware analysis report

Static analysis result for SHA-256 42dab52d59e698dd…

MALICIOUS

PDF

78.2 KB Created: 2021-03-30 13:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 117bccc09e9c972c633b50e8b442bf74 SHA-1: ecc0f07e88a8e73b458913c558999f55c3be77d3 SHA-256: 42dab52d59e698dd945446e23eb35a225dcf67d3e752aba25a985f01af926a5a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, consistent with a link farm or SEO manipulation scheme. ClamAV and ML heuristics flagged this PDF as malicious, specifically as a phishing or trojan distribution vector. The presence of numerous external URLs suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=riddles+with+answers+in+telugu PDF link annotation
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/bikarazevunu-wadonifiv-tumezeloxazu-degejaziropigo.pdfIn PDF document text
    • https://karujelibofab.weebly.com/uploads/1/3/1/4/131406149/2062081.pdfIn PDF document text
    • https://bogibopedazite.weebly.com/uploads/1/3/4/0/134018154/b024aede81c5.pdfIn PDF document text
    • http://d2-club.ru/xbox_one_wireless_controller_amazon_uk4pwp8.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/9777d02ca1fd2d8.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/26708431738.pdfIn PDF document text
    • http://clientbluebadge.com/nice_guidelines_high_blood_pressure_in_pregnancyube18.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/gfjcdhc/logejadobipilegasapi.pdfIn PDF document text
    • http://basiditdcf.space/crush_them_all_best_staging_team5r7j1.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/e457975322.pdfIn PDF document text
    • https://cdn.sqhk.co/penavagalo/znEibhc/vumibevuzibuzuguziwos.pdfIn PDF document text
    • https://cdn.sqhk.co/wosinuwukabu/hijidlm/beautiful_colorado_euphonium_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/mibazudifij/jao50jh/94372463681.pdfIn PDF document text
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/8a6a7fc4.pdfIn PDF document text
    • https://sosakenokez.weebly.com/uploads/1/3/4/4/134445245/b2f75dc43dc.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/YXDtcid/baixar_dead_colony_mod_apk.pdfIn PDF document text
    • https://bobiguwifuza.weebly.com/uploads/1/3/5/9/135966914/kaleve_vilegapipu.pdfIn PDF document text
    • https://fexagoresex.weebly.com/uploads/1/3/4/3/134337575/puzamimot.pdfIn PDF document text
    • http://vizit.store/one_day_my_soul_just_opened_up_audiobook8jiwz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/kasujufefelipiz.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_off0000f4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B3 5188 bytes
SHA-256: 0c166ef05d9cb5f36deb7619c84fd3acf8b20928ca01bfbe603bb8006b4aec43
font_01_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 11024 bytes
SHA-256: 3a0ee0880f09d7f969ee6c063112300b48fdf13fa7e37b37133b4efb7f848533

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