Malicious PDF — malware analysis report

Static analysis result for SHA-256 60032f5f8089b3f0…

MALICIOUS

PDF

89.7 KB Created: 2021-03-12 17:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c07d821f24a11e74b1c2ebf77d54605d SHA-1: 0fe0f4e5c44734b71dd592f6dd176519ef04606c SHA-256: 60032f5f8089b3f071bbdb8d293d44c3e702e5fb849ed921d0216ab29ed37203
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, appears to be related to 'Julius Caesar quotes', likely a lure to disguise the malicious nature of the embedded links.

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://nipisod.ru/strik?utm_term=julius+caesar+quotes+with+page+numbers PDF link annotation
    • https://cdn.sqhk.co/puzadowoke/MidSMhf/idle_space_clicker_mod_apk_1._9._11.pdfIn PDF document text
    • http://kifejuja.medianewsonline.com/halo_fall_of_reach_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/fezemepusap/TiegHic/86467441103.pdfIn PDF document text
    • https://cdn.sqhk.co/genonitag/ZifibD0/15904314312.pdfIn PDF document text
    • https://cdn.sqhk.co/fedugaxoloz/hcjitgj/76882000002.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/how_to_use_remote_starter_mazda_3.pdfIn PDF document text
    • https://cdn.sqhk.co/dedomafub/iCEiiLG/bounce_house_rental_hinesville_ga.pdfIn PDF document text
    • https://cdn.sqhk.co/xedomobedusi/aZZggXM/32756703134.pdfIn PDF document text
    • https://cdn.sqhk.co/razotefo/0Liexhh/37596190146.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/S4Gohgs/stickman_soccer_2016_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/jhmjb8y/87272043112.pdfIn PDF document text
    • http://delinapod.mypressonline.com/hyundai_service_center_melaka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/920c3d68-9d38-4f60-9a66-45ee2d847fe4/vulofifugesurakezilawovi.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/safuze.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/doxixavif.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_374cca7399a44b29ac0467d8641c068a.pdf?index=trueIn PDF document text
    • http://beliraguw.onlinewebshop.net/povogusujexevalid.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/scottish_league_2_form_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6a2a95-3d79-4916-b69f-0791d5794863/6854377524.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_c853b3ddda2a42cdb35c941eeebe013d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/51822289302.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_off00011f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F85 5696 bytes
SHA-256: d3e8d2a0a1fc942569d4e838ce8f990b1acc6761efecd5688206fa64c4f5da3e
font_01_sfnt_off000132ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CA 11500 bytes
SHA-256: d193c1c78fde9efadc337e0ab20f05533d5bc5a8f7460de5d70893b622d99a21

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