Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb563122febcfc9…

MALICIOUS

PDF

92.1 KB Created: 2021-06-10 20:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c7c9e856ba1c96a2cd3728ec7bb54921 SHA-1: 2f3cde91853df93b3c015db9b877cc8d85988f1c SHA-256: 0eb563122febcfc95652e1284483d3d27c1dddfc2e0e57a996a46b45ec88ec58
186 Risk Score

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 0.9992

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://crewmak.ru/pbw?utm_term=codex+eldar+8th+edition+pdf PDF link annotation
    • https://sozugubew.weebly.com/uploads/1/3/4/8/134893137/c638f91f73db6.pdfIn PDF document text
    • https://majuzifulanapu.weebly.com/uploads/1/3/4/8/134887757/467c1.pdfIn PDF document text
    • https://menedusuwoguv.weebly.com/uploads/1/3/4/6/134699995/522abd35f6f5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454171/normal_5fcd827fd9d1c.pdfIn PDF document text
    • https://dabomisefeb.weebly.com/uploads/1/3/0/7/130775205/mopusatiw.pdfIn PDF document text
    • https://supokiroxuleniv.weebly.com/uploads/1/3/1/6/131606692/wojisowew-vupavavo-rasupuxeluxif.pdfIn PDF document text
    • https://vixekilawuta.weebly.com/uploads/1/3/4/3/134305586/mopuvuzogezazog.pdfIn PDF document text
    • https://ruwofemenir.weebly.com/uploads/1/3/4/0/134040866/8557225.pdfIn PDF document text
    • https://wemavepudobug.weebly.com/uploads/1/3/4/1/134108610/pofenir.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/7874261.pdfIn PDF document text
    • https://lirurarupo.weebly.com/uploads/1/3/4/7/134770738/jakozeli.pdfIn PDF document text
    • https://paweweribawu.weebly.com/uploads/1/3/4/6/134656346/ce51a50d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_6028b179af7b1.pdfIn PDF document text
    • https://babaxumo.weebly.com/uploads/1/3/4/3/134379683/jasadaxuxoxade.pdfIn PDF document text
    • https://zobezefifoluza.weebly.com/uploads/1/3/5/3/135306737/4435513a8.pdfIn PDF document text
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/10bff05787c.pdfIn PDF document text
    • https://ruxipomipojo.weebly.com/uploads/1/3/4/6/134651614/nuzufoduravujax.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/sowomemufim-fofosiwow.pdfIn PDF document text
    • https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/2717278.pdfIn PDF document text
    • https://navolujute.weebly.com/uploads/1/3/1/4/131483334/55024.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/ec344818-b62b-4e96-a2ee-20e85d9b4036/ps2_emulator_android_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463ee1b8-7c25-4b1d-aace-b79b4494113a/how_to_know_my_post_office_account.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a104f0-e60b-4570-aeee-9b6f982ee5e2/tekadirolizidufutob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a86642-25d8-45ee-99bc-c1e0146c2605/teradek_cube_255_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f19818f-853d-4172-b4b8-223a1435da0c/nomejodik.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_off0001290a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290A 5120 bytes
SHA-256: 226d71c8af111ea38deda2a45ec44c5755ce13e994eb6193a57972d830db6c69
font_01_sfnt_off00013a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A70 11904 bytes
SHA-256: 9dc9ee72f2a9d1f644204abf791bf5af3b6e061a1393e37322ee4a73b5f5b174