Malicious PDF — malware analysis report

Static analysis result for SHA-256 707374c17c88f374…

MALICIOUS

PDF

100.2 KB Created: 2021-03-18 01:35:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9412c1dc1614dcaeed37ea65311f9ad1 SHA-1: b6578f3259ddd7b259314fcc7414962c8fbfc45d SHA-256: 707374c17c88f3741b8a6e122aec164a50f6418d9f34547c67369822b72c2271
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/award?keyword=bcom+sem+4+books+gujarat+university+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407057/normal_600838cfa3446.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/throne_of_glass_heir_of_fire_charactersg4gy5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467325/normal_601f0272dbec9.pdfIn PDF document text
    • http://jabewes.medianewsonline.com/what_is_the_proper_term_for_native_american.pdfIn PDF document text
    • http://sandwichhq.club/kexofuparetusid5db55.pdfIn PDF document text
    • http://finonit.mypressonline.com/zepipapenoga.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/mowevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479237/normal_60349cbc480c7.pdfIn PDF document text
    • http://dowotezovemalo.mygamesonline.org/where_can_i_purchase_a_metal_detector.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/d8646d90-e929-4e7a-a98b-62a9d72b2c12/46491167437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8b4b25-4edf-42e1-903b-83c378c1e8db/the_little_match_girl_summary_questions_and_answers.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/niwufumesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78461a2-d615-4989-a874-1ddda40377c5/frigidaire_mini_fridge_pink_9_can.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d3da27-380f-46bf-9938-f90ebc9d4174/honeywell_thermostat_not_turning_on_heat_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276a0e01-35de-458a-8d43-a120247e88c5/xirarivi.pdfIn PDF document text
    • http://gibidapasajug.atwebpages.com/drugs_abuse_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe13bd0-808c-43cc-afd8-10f6c8fbb3c9/lijigusetida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c49c15-acd0-4e17-8989-3451a4b66eb9/cual_fruta_no_engorda.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

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_off000145a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A9 6020 bytes
SHA-256: e88be5212367e4f2f3236e24548d6a94e8ca68ade64d17d3fb4e78cab11f0ae8
font_01_sfnt_off00015a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A31 12104 bytes
SHA-256: ef84ba8f31930289832ef24a57d84160ea276bd45c09d51e02cdf04f9bf32f5d

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