Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3687dfa23d35974…

MALICIOUS

PDF

79.7 KB Created: 2021-04-09 15:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4fb5d9086b9cc42b589cc291402a185b SHA-1: ca6f80754cb1a5e5c0d1b55cac040f49bc9d9e98 SHA-256: b3687dfa23d359748dc91ec690bd043963bc73867236062e5db695598703f4d0
266 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of phishing and trojan activity. It contains numerous external links, suggesting a link farm designed to redirect users. Notably, the document includes lures for clipboard command execution and handling password-protected archives, common tactics to bypass security controls and trick users into running malicious payloads. The presence of these lures, combined with the suspicious URLs, indicates a high likelihood of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dugedepap.ru/strik?utm_term=pax+s80+password+reset PDF link annotation
    • http://about-central.com/26100716777ao75n.pdfIn PDF document text
    • http://bepajizijuxiz.iblogger.org/cuadro_de_cargas_electricas_residenciales.pdfIn PDF document text
    • https://cdn.sqhk.co/seranowe/e8aXGgj/adobe_photoshop_passport_photo_action_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawitaxug/8jchiHC/kosuno.pdfIn PDF document text
    • http://redpandarecycling.com/bixidikesojopegebigipoziflchg.pdfIn PDF document text
    • http://umniashka.ru/30441845121u1q76.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/ad5PiaP/zuzesudekirojedinuloruxaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/09a16923-f65e-4926-8d43-c6c926163402/honda_gcv160_pressure_washer_recoil_starter.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/78360989487.pdfIn PDF document text
    • https://b5526579-b22d-45a0-8251-9885a72cf3eb.filesusr.com/ugd/0cd019_a1799ee8330b4eb9a8dd0b70d85c9d19.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc75b229-493f-4f8c-a844-4507954bc4ca/rofukegaguzodutesilew.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/venijuwojiloz.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/how_to_scroll_magic_mouse_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c52fcd-298c-4665-bb0e-58ebad6933c3/law_of_trust_in_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/atomic_bombing_of_japan_source_analysis_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d8f896e-71fa-4be5-bd11-d5c501530131/21833820147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bff175-7f1f-4d16-ac12-6172c6941e2b/how_to_learn_general_chemistry_fast.pdfIn PDF document text
    • https://728bf1be-24e3-4891-ba98-fedceca1a503.filesusr.com/ugd/3268c8_d9c57c37798e426c8e78f6a98a03c58a.pdf?index=trueIn PDF document text
    • http://savefativiluz.epizy.com/xoxinomoramitawapub.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/gcse_higher_tier_maths_revision_worksheets.pdfIn PDF document text
    • http://bevetobepo.rf.gd/26588551999.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE27 5052 bytes
SHA-256: 3fb201daaca51eaf4bc664fe43e19fb81790d3edd0dd0fe28cb202ff9e2fcb7f
font_01_sfnt_off0000ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 10620 bytes
SHA-256: ebf818cd428d56aa8d468b3eddbc9c0f71a054417b50464b52d80864cee51074
font_02_sfnt_off000123ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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