Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbd069050bfb6ef…

MALICIOUS

PDF

78.7 KB Created: 2021-04-28 05:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: edeac40ebc5ce3a26db41b26192be206 SHA-1: 7038439f03d0dd1538f8450ecb8d8b10c85c561b SHA-256: 4bbd069050bfb6ef36c55cb4499791dd51dda134b1fc311cf2ae7791219d3bdc
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. 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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://mezovuduw.ru/strik?utm_term=rocketfish+keyboard+won%2527t+connect PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450634/normal_603c5503b9aa3.pdfIn PDF document text
    • http://vitalia-transports.com/hello_bixby_apk_for_oreosexgy.pdfIn PDF document text
    • http://fresh-ita.space/zudosktwoa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444378/normal_604d7bd966933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500417/normal_603d895cc9237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_6068547f4d328.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://79e5ec13-148a-49e7-9308-7b7844992bd9.filesusr.com/ugd/1d149b_d6cd25e1bd3544578a0a1241687bebc4.pdf?index=trueIn PDF document text
    • http://verirajoxa.epizy.com/baidu_browser_for_android_phone.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_2e478286ed52486bacefc9b93658e5f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab17943-c6eb-48b6-a8cc-a90d990877ee/baby_cache_chantal_crib_instructions.pdfIn PDF document text
    • http://juvoken.epizy.com/engineering_mechanics_dynamics_8th_edition_meriam_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb424ce-9589-4d69-a2a0-ea5559d6a97e/zakotiru.pdfIn PDF document text
    • http://lojetewope.epizy.com/cell_cycle_regulation_worksheet_answer_key.pdfIn PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_1e01790166974195b033b9cd2f75e74a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/612cb3cc-b961-442c-90c1-c3d200ab2f70/john_deere_310d_backhoe_attachments.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/pufopotepejakotujisoxeb.pdfIn PDF document text
    • http://walefofu.rf.gd/arriscando_a_propria_pele_taleb.pdfIn PDF document text
    • http://zudovufakigib.epizy.com/alcohol_use_disorder_dsm_5_criteria.pdfIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_76b0a44ee3eb44d8a451a294baea5b98.pdf?index=trueIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_8d529ba4e2f9432799bcd71ec29f78b7.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 5516 bytes
SHA-256: a16d24a7666b0ac49fe3eea54c50eb838caac9c7b7eeaf3ac213bc0c0ccb6054
font_01_sfnt_off000103d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D4 11636 bytes
SHA-256: 87dbe7425dcab476ba9b14d5c3a0b940c8f939a7eb284c7b163ddd1ba0d92633

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