Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea9cc54b29d236a…

MALICIOUS

PDF

86.1 KB Created: 2021-05-12 13:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 993e10b9d6e722ba4c2b375d8c8bbd3a SHA-1: 728c9a7cfb01d4b8ecff9894cc605943348da446 SHA-256: 5ea9cc54b29d236a862d6080b5f47af3d103ab4171c0178dfffc6cf31bcd7b49
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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 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://resalured.ru/strik?utm_term=formula+del+volumen+de+un+prisma+triangular+regular PDF link annotation
    • http://ultra0.space/block_puzzle_star_finderxncxn.pdfIn PDF document text
    • http://kernig.online/fezobebenefupabifanuluroj30w.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/gasaladegujuf.pdfIn PDF document text
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/470b921.pdfIn PDF document text
    • https://fitatopiwize.weebly.com/uploads/1/3/0/7/130739398/zonadujowupofif.pdfIn PDF document text
    • http://adanakebap.org/93457951715gzsk.pdfIn PDF document text
    • http://copyright-notice-ig.com/pomeranian_breeders_in_pennsylvaniap0h88.pdfIn PDF document text
    • http://tajevis.22web.org/93728547828.pdfIn PDF document text
    • https://zadobixif.weebly.com/uploads/1/3/1/4/131437920/dajov.pdfIn PDF document text
    • https://bukenazupe.weebly.com/uploads/1/3/4/5/134584610/dc2b0b9e35f45d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_60273aa812ca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419629/normal_60233bdd909fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vugovule.epizy.com/reminape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5141a873-4f67-4ddd-bd27-701de23afdb7/89189173947.pdfIn PDF document text
    • http://rabelame.atwebpages.com/gojoxararukanogejuneli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a30528-0462-4433-b090-185069a84e1d/wazelizevefatipaponasogis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff83b67-0613-44d4-b5cd-afb25096bbbc/dimefujejerabinij.pdfIn PDF document text
    • http://xenivut.epizy.com/19688190251.pdfIn PDF document text
    • http://ladopinizaxo.rf.gd/rules_of_attraction_book_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22606180-4ebc-4dbf-a005-d4932bbe81ca/lg_v20_price_in_uae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5b12e3-03a3-4965-aea2-4e71cc95d449/marugeli.pdfIn PDF document text
    • http://wobirazegezuw.epizy.com/ubuntu_12._04_iso_image_32_bit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF724 5292 bytes
SHA-256: 6f6fa3d973c5f8ec958f545c0dccc7a5d7ea55c8566001f55c04df5e9418aa75
font_01_sfnt_off00010917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10917 13784 bytes
SHA-256: e13187b9cf90d10929ebdac6799aaa0c128f4fc3c7eadbd493458d44007bc009
font_02_sfnt_off00013386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13386 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

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