Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d47dbe8c952392…

MALICIOUS

PDF

87.0 KB Created: 2021-05-27 03:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ebc0577aca9cc791843a09d8ffbebd18 SHA-1: efa2ecddec89c5cbc18521b3d7436c9b64a0c8f2 SHA-256: 80d47dbe8c95239207d5f3114b31629fd45064cde5cd7a29caf641eddc195489
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded external links, a technique commonly used in SEO link farms and phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious websites. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest an attempt to exploit users through web redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://leonvi.ru/strik?utm_term=how+do+i+adjust+my+g+shock+gba+800 PDF link annotation
    • https://fexatawolev.weebly.com/uploads/1/3/4/4/134445796/059b003d50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486034/normal_6006103f7a875.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498345/normal_5fd8e6c8c86aa.pdfIn PDF document text
    • https://ribufesoguvas.weebly.com/uploads/1/3/4/6/134680119/dojufila.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410447/normal_5fcdf6870358f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_6045f52d651fe.pdfIn PDF document text
    • https://tapukinag.weebly.com/uploads/1/3/1/6/131606864/28d54fadb49bf.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/bb965b80-50e9-4364-9126-ec6e32202271/triangle_congruence_practice_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a530f1-f7b9-496a-a3bb-9ab1e0b7c4ac/22195023298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d44486c-0edd-435e-84b3-2a470dc46773/86011647523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef2545c-441d-414e-8843-7e2d622c8f31/28482543569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e72806-3b93-467a-91ba-4ba760284860/how_to_potty_train_in_one_day_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be47ea72-f1dd-4407-ad66-5ade172cdc58/jekokigotapugumugumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770ae953-bff4-4b0c-a13f-99d9cccaed33/do_you_have_to_charge_tax_on_paparazzi_jewelry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e55e874-8847-4225-9122-778335aafc7d/age_of_reason_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ea317b-5f18-4a02-a0d9-6201eec40f67/rojelifuniter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b93ff37-d23d-467a-9e1b-00cb308f9d81/seventh_day_adventist_church_open_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beae4a98-a637-4e6b-833b-81e906396eb5/34593463256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fedd885-a576-45bb-9304-d7ae3668e24e/how_to_fix_my_cool_mist_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33fd6aa5-c175-4f3e-b123-ae1a855bc1bb/dovexowosoxifoxuvopesix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96624d92-d5e2-4422-8eaa-d234613e3c39/59662915206.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_off00011163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11163 5996 bytes
SHA-256: 34fb73e94553ce8a4a0bc12d71d2856dac8d01eef94a76c906d1d329b1cab978
font_01_sfnt_off000125c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C1 12048 bytes
SHA-256: 56bb68cd659a0d1d75ffdf0b77b73a8223d001176429996e6d65c09dae5f5042

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