Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c1646724e449dd…

MALICIOUS

PDF

95.4 KB Created: 2021-03-18 07:04:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 537412917406255344652e2f54df0911 SHA-1: b32724fb017edc8c2cded2a76f04dc7bf30333b5 SHA-256: 93c1646724e449ddd0469008b0b6238e4c2c985d8ed41b6351547bd7a9358656
206 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. The presence of embedded URLs and the 'callback phishing phone lure' heuristic further support a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://zajinet.ru/strik?utm_term=the+lottery+questions+and+answers+pdf+commonlit PDF link annotation
    • http://chatik85939775.fun/zevakitizijononuzibugalijonulg.pdfIn PDF document text
    • https://cdn.sqhk.co/guzufaseba/hehhIhg/gerefaguz.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/VT5QEAc/monster_warlord_evolution_materials.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/g2icFhf/download_soccer_hero_java_game.pdfIn PDF document text
    • https://sidatugalelukad.weebly.com/uploads/1/3/4/6/134639108/xupogexe.pdfIn PDF document text
    • http://creditscoretrack.info/fuvutevulgdh1r.pdfIn PDF document text
    • https://cdn.sqhk.co/bagojenul/gf1hahd/83131106857.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/ibiaJgg/smith_s_near_me_hiring.pdfIn PDF document text
    • http://sfr-webmail.com/vebozira29s5l.pdfIn PDF document text
    • http://changepass.online/xanefijokufisolafivax98jjz.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/HhbjbKa/10769710772.pdfIn PDF document text
    • https://murufafutebe.weebly.com/uploads/1/3/4/4/134473477/bukiwixawex.pdfIn PDF document text
    • http://glossywp.online/the_last_lecture_epubp841s.pdfIn PDF document text
    • https://cdn.sqhk.co/nimawabej/6ihgdia/jujebuzufazamo.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/aidCgdv/ms_bike_ride_2019_cowichan_valley.pdfIn PDF document text
    • https://cdn.sqhk.co/temisexezoda/6w7AnJu/swat_costume_party_city.pdfIn PDF document text
    • http://leoidet.xyz/puxalarinuwonakigizidok4t30u.pdfIn PDF document text
    • http://rinusiwujegabu.medianewsonline.com/40628159830.pdfIn PDF document text
    • http://optamorem.com/what_are_film_codes_and_conventionsobnrx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitujiduruv.myartsonline.com/kinds_of_adverbs_worksheet_for_grade_4.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_off00013611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13611 5664 bytes
SHA-256: 862841a277128817ab7cf163b30bfe22ace2f44773382c1c99a6fb9839d65942
font_01_sfnt_off00014944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14944 11448 bytes
SHA-256: 3af810e9c64dd3e58ab8823248eecd2df3c84186d8bf1f4c74bb481f5304117e

Open this report in the interactive analyzer, or submit your own file for analysis.