Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ba74f94eac1913…

MALICIOUS

PDF

74.0 KB Created: 2021-02-23 00:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bf7ff5ed6676c16582fa495907bd996c SHA-1: ae3ef6a304a933209db8b2a48125c751cb8a94f1 SHA-256: e2ba74f94eac19136441ca2fdbaea9da8bbaf21cb9bcec2b55a19e76885f776e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or spam campaign. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, appears to be a lure related to search queries or answer keys, designed to drive traffic to malicious or spam sites.

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://bologen.ru/wix?keyword=cause+and+effect+match+them+answer+key PDF link annotation
    • https://cdn.sqhk.co/feketukadoz/giYbje4/suwudimudupagigav.pdfIn PDF document text
    • http://twenty-promo2020.ru/novation_launchkey_49_mk3_logic_pro_xbujqr.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/Fgj5fjc/zed_top_lane_counters.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/cjjmnNr/89902967216.pdfIn PDF document text
    • http://losqutoq.online/what_is_a_normative_question_in_political_sciencel3hwr.pdfIn PDF document text
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/xekujapuxamigudag.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/gifqhii/pc_games_free_play_now.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/iajhAjf/infective_endocarditis_treatment_duration.pdfIn PDF document text
    • https://cdn.sqhk.co/desixurate/igot7Pa/old_second_national_bank_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/jhTifCE/green_new_deal_cons.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/vhgifo2/no_fotos_por_favor_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/wemojezuvegi/gcthfge/extreme_landings_free_online.pdfIn PDF document text
    • https://puzagetidorijes.weebly.com/uploads/1/3/4/4/134495880/dakab.pdfIn PDF document text
    • http://zakofuta.66ghz.com/ugly_christmas_sweater_party_invitations_free_templates.pdfIn PDF document text
    • http://xelipev.22web.org/contemplate_in_sentence.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/zuses/jitorojawepokirevoxetajo.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/53791304887.pdfIn PDF document text
    • http://ketanuviz.epizy.com/jukirigev.pdfIn PDF document text
    • http://pixagikaw.epizy.com/countable_and_uncountable_nouns_worksheets.pdfIn PDF document text
    • http://rubofad.rf.gd/burger_photo_free.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_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 5392 bytes
SHA-256: 3202e7e104166f6a7cde5c1614975ff0a5280bf59607f2deb1bd964cdf0ae5fc
font_01_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 10804 bytes
SHA-256: aeb739853a3eab66ea47af17c9d3f8ee2101fbc4fbe59da0021abc4bb34a2f6f

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