Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca145391466dad4…

MALICIOUS

PDF

77.0 KB Created: 2021-04-29 05:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c2af5e7c57fdaa2d3a888760e6ed5a00 SHA-1: 5ef2a1619617dfcd365fd73ce91bcbf21d57a14b SHA-256: cca145391466dad412d3a957451acfde297afab39f215b708eca9ab1466700ed
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 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 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://bologen.ru/strik?utm_term=what+is+lean+six+sigma+course PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fd152b59ffdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499653/normal_603ffd9b88d7f.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/percy_jackson_the_battle_of_the_labyrinth_indonesia.pdfIn PDF document text
    • http://xuxodowenam.getenjoyment.net/tinamuroputupukizopiza.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/mQjcCjg/ifttt_alexa_alarm.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/jegfhiD/ultrasound_detector_app_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/e2jaAhj/anno_domini_1257_warband_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/boremagu/difhf4T/twin_platform_bed_with_storage_baskets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_af9ded92d3354a7992a39030261b382a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc3e6bf-9640-4086-8366-0659f4e18d51/geometry_chapter_6_resource_book_lesson_6.3_practice_c_answers.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/mosajig.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_2783b13b65b243ea9c3286a356cd39b3.pdf?index=trueIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_3002287d56d14d469c8b1c30d0a4d6a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fed6a97-35fc-4f2b-a99b-a1f56fb7be4f/sisujizukidafadizo.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_bc4adc24caf84627adcf2d6057ed9a8d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a3d055-c965-4db8-a6ae-22dc6347f278/elm327_mini_interface_software.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_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 5292 bytes
SHA-256: ec11d86a2ba6680793295a6ea8e84c490c74733951f5105d9a5129231acf2f0c
font_01_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 10780 bytes
SHA-256: 1248be90c908ff8f8c813ec82d518233d82d60f9a72b969ba0dbfc89dc7288fc

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