Malicious PDF — malware analysis report

Static analysis result for SHA-256 64264f49041a42f4…

MALICIOUS

PDF

91.0 KB Created: 2021-03-19 11:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d1fc80823c3e958273271ad6e169f5b SHA-1: 5f55e0020a7e84aa06c9ac353225bc9e200c3d9a SHA-256: 64264f49041a42f4aca61249865d611a4dc460d07bf462bd3c4d3899186b2d0f
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 0.9991

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
  • 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://xajibur.ru/strik?utm_term=boatswain+mate+tattoo+meaning PDF link annotation
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/3048107.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/a805ac9207d8.pdfIn PDF document text
    • http://shmelev.pro/how_to_get_money_cheat_on_sims_4_xbox_onel6wag.pdfIn PDF document text
    • https://fefezotexarij.weebly.com/uploads/1/3/4/2/134265886/ledunajiz-golojepoze-zanavo.pdfIn PDF document text
    • http://healthytrands.com/strategy-_proof_location_on_a_networktrtot.pdfIn PDF document text
    • https://nuwoveforu.weebly.com/uploads/1/3/4/0/134099073/rixewebut-zojaj-tosuwa.pdfIn PDF document text
    • http://devgame.design/fusamemikelakowupanw5sy0.pdfIn PDF document text
    • http://maska-respirator.com/moxovubamekuxupekudomawuv4x2lr.pdfIn PDF document text
    • https://potezevaledu.weebly.com/uploads/1/3/1/4/131406960/6458072.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_1fa599a8438344c29ddc17fda1484853.pdf?index=trueIn PDF document text
    • https://e85625e8-91d5-48c2-95a4-67b7b95d5b39.filesusr.com/ugd/b97a97_215aa97774cd4001b75be7533c6566c4.pdf?index=trueIn PDF document text
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_3e4f97be3476413db92f32986e1b7aff.pdf?index=trueIn PDF document text
    • http://fiwusinuba.rf.gd/value_attribute_html_form.pdfIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_59920761e3954a36be19077c981de990.pdf?index=trueIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_62045321ba894f0b92ef6c4309616143.pdf?index=trueIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_16c37739dae94c3f9e6280ea971dd7c8.pdf?index=trueIn PDF document text
    • http://janalusexisowa.epizy.com/electrocardiograma_aha.pdfIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_b7fe649a00644546886ea9e5bb8da5a4.pdf?index=trueIn PDF document text
    • http://fididebezewigex.epizy.com/suunto_ambit2_watch_strap.pdfIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_ad3b7efe651a45bcaa22f707a328475f.pdf?index=trueIn PDF document text
    • http://xenivut.epizy.com/cerebriform_nevus_cancer.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_55c8f70aca6f4807b735d1e1211a2c0b.pdf?index=trueIn PDF document text
    • http://lazevemu.epizy.com/xuvudowudizewemosejeluf.pdfIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_39b3249098ee4cbba5aae3dec45ced0a.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_off00012588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12588 5016 bytes
SHA-256: 1d993a8854fc29ae96ceb35e3d46e2bdc882154f15990536d182a2b47e8eac7c
font_01_sfnt_off000136a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A1 11704 bytes
SHA-256: 96b2f583622b42baa3118ed6a74df408b52ee5b00b1006c1e0250f0789e219e7