Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ab6c9f9860d972…

MALICIOUS

PDF

80.2 KB Created: 2021-04-06 09:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8a206c0ba4b83a5bf515a6604ffc31a8 SHA-1: 5bfc58b55a92d700de5a427bea88ebbea8e144e1 SHA-256: d4ab6c9f9860d972d6c74b8b93122721c0937f635ba133ef12a3dc0b95456b97
206 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. It uses a QR-code 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 0.9997

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ponafet.ru/strik?utm_term=dixie+narco+501e+hvv+parts+manual PDF link annotation
    • http://xodinazafomizi.22web.org/pelisalenagonilesovate.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/HAcji6O/ultimate_viking_empire.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/TK7K0jc/xibejazotusut.pdfIn PDF document text
    • http://boputev.66ghz.com/cacti_templates_interface_traffic.pdfIn PDF document text
    • https://cdn.sqhk.co/muwitajo/hggqVT7/54062965859.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/pexeletodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80378e84-8a5e-4b2e-94f3-dc48002a5bfb/how_to_cure_constipation_by_yoga.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/runaxifebogunakaregumowak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8934cf17-8d0d-4d7d-bf63-0bdef191df90/cosco_scenera_next_convertible_car_seat_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b09ee6-76cc-4d4a-8b2d-bc5032500552/bagabapetubamonep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0611f0bf-e7fd-41ed-9930-f20b3a32086f/xufajaxosoxavidu.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/46753398519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb39084c-ed6f-4877-9b09-d10167d48cc6/krups_964_filter_basket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca728eff-3eba-4f0f-9e5e-feff2f73f7b7/are_braun_coffee_makers_good.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/cognitive_behavioral_therapy_techniques_for_retraining_your_brain_review.pdfIn PDF document text
    • http://baniteb.epizy.com/35007890506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9411633e-602b-4e9f-a4c0-84cbbed83a81/the_bear_william_faulkner.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_f63c4c44e25e4cf8b07608dcd8d5b24e.pdf?index=trueIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_5c1cabf1ffb4418badc53957d004197a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfa99275-bc43-48fa-be54-945e935170b8/1488446252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6ac9e9-79a1-42df-8357-81b8e92a6beb/17329219748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6163864-6d51-42bc-9a62-bfe88cc2c266/varekig.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_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 5616 bytes
SHA-256: bd1bbe69f3a47afe000302b0c420f12f28eb643acad306e0c6b30ae4ccca6d3a
font_01_sfnt_off000107de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DE 12604 bytes
SHA-256: ba567feacc18a35147351c00ffad3fad4a24602408137501b929e19a1825e209