Malicious PDF — malware analysis report

Static analysis result for SHA-256 db59e2a563c91ca2…

MALICIOUS

PDF

77.5 KB Created: 2021-03-27 23:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 167726f80d46a37195bd0375efbc5ab8 SHA-1: 8fe1dd091b077070094983aa0e6c359b22400e5a SHA-256: db59e2a563c91ca2e039d20a34bcbc4ad3fe285a65244a7cb80eeb065cb40fac
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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/aws?utm_term=how+to+fix+mafia+2+has+stopped+working PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377704/normal_604fca0c549c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465400/normal_5fce90429e491.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/35881790798.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379723/normal_5fc8d5507f317.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/autocad_software_download_free_for_windows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_6041b694aa513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_6057bb1659e17.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/cc_link_mitsubishi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_6028a437224ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_6019dfa93ddb5.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/detatu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5ff468d528438.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_05b27e59de8c4d4b9d12258d17e47472.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3deb02b0-dd3a-4675-a772-341d9bc2a2da/how_much_is_the_bus_from_new_jersey_to_new_york.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bb4b814-cf67-4038-a030-6e4de3e1fad1/rt-n12_wireless-n300_router.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d789231-5e26-43e1-a833-cd08cd30d62a/felufobugisow.pdfIn PDF document text
    • http://mepitar.atwebpages.com/roderixibupumudufepasig.pdfIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_09c84aa09156455b8ec2908c462a44b1.pdf?index=trueIn PDF document text
    • https://45f0f727-c607-4398-b3b7-8b42e23b21b2.filesusr.com/ugd/0a84ca_7d1c5b6ee57743c6881cb0ef31fa86f6.pdf?index=trueIn PDF document text
    • https://67f302de-cccb-4c9a-8108-a6853b9d8e1b.filesusr.com/ugd/94e5ef_872be65054144cd183bcdafe9e0f66ad.pdf?index=trueIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_4237a225775f47cf84e08426311aa6d4.pdf?index=trueIn PDF document text
    • http://pudugivifo.myartsonline.com/73787303158.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_off0000ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 5740 bytes
SHA-256: 351481a3eb58b124ec162e47991590bc46cefd3cbbcc4a3b3401781bb791c8b6
font_01_sfnt_off000101fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FC 11452 bytes
SHA-256: 690f8c77f620061eedce9610afc343398983e4b0046403101c6ee0d1e2d371b3

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