Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1bc30ac74e0e7b…

MALICIOUS

PDF

79.5 KB Created: 2021-03-14 13:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc3316b80b9f2c9de914af82d695c86a SHA-1: 15db971aa2374e599a39cdd2c209a537a9b820fd SHA-256: fd1bc30ac74e0e7b57bb8e6f6a6a713d22aee20aaa492c055245695aff440dbb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://jacksth.ru/strik?utm_term=infinix+note+price+ph PDF link annotation
    • http://naturfresh.space/perfect_english_grammar_past_simple_exercises_irregular_verbscys39.pdfIn PDF document text
    • http://delinapod.mypressonline.com/photosynthesis_and_cellular_respiration_worksheet_answer_key.pdfIn PDF document text
    • http://xeboxemovev.66ghz.com/brown_freezer_paper_sheets.pdfIn PDF document text
    • http://dixajarinuvaw.iblogger.org/ligot.pdfIn PDF document text
    • http://andyhongdigital.com/xodijibesipigezbez0.pdfIn PDF document text
    • http://potuduwatolebu.mywebcommunity.org/public_policymaking_james_anderson.pdfIn PDF document text
    • http://puximosuse.iblogger.org/how_do_i_program_my_philips_remote_to_my_tv.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/lagoxug.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/runadazudenozur.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/logitech_z323_2.1_speaker_system_with_subwoofer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pupitudaxomibi.epizy.com/huffy_cranbrook_seatpost_size.pdfIn PDF document text
    • http://nefijeniwipe.epizy.com/85477316819.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/principle_and_instrumentation_of_hplc.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/nevakamanajogedakilukafir.pdfIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_8bf39294129c41a2b2089bb17bb437af.pdf?index=trueIn PDF document text
    • http://bowomufe.epizy.com/sumodupesebumagafo.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_61109aae62b94f44b4c8132d94403b9f.pdf?index=trueIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_5bef6dd4811e4dc39f5567dc0834c208.pdf?index=trueIn PDF document text
    • http://xogeguf.rf.gd/bmw_x3_2012_owners_manual.pdfIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_7c893feed60d48daae58b7e979a4849b.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA9 4688 bytes
SHA-256: 1f3c1956b5881e3c35102a35c2a1c16f5d7a62735af9c60523b1d38a32729528
font_01_sfnt_off00010ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA7 10768 bytes
SHA-256: 8a507a9bdf8ae65ea71255ded3158ca377efbde641deac2e74802e00c0a367af

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