Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d4eb800e678168…

MALICIOUS

PDF

77.8 KB Created: 2021-09-22 14:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0399d922af140c08685e02b052fff3cc SHA-1: 082241887529b8d9b8d83fa4a2492b1f99d38cac SHA-256: c5d4eb800e67816822aedcb537bb17bde3c783823e924c019deb584be3e2abe9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous embedded URLs pointing to potentially malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a tactic to obscure the true destination or distribute malware through a large number of low-reputation domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=harry+potter+full+movie+123movies PDF link annotation
    • http://edilgroupdigiovanni.it/userfiles/files/59987026487.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/sopajetabujuxafilowogoxi.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/mifatedabe.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/pedugugasowof.pdfIn PDF document text
    • http://gurukripapublicschool.com/userfiles/file/kovusawenaxezutojovup.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/woxexima.pdfIn PDF document text
    • http://ladna.pl/user_images/file/wafidivenavigus.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/83010289089.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109160815502139.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/64333735829.pdfIn PDF document text
    • http://gewidor-gmbh.de/uploads/files/87936670113.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/koxulufisira.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/funemep.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/nawotujizorepire.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/jegibomebeme.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/fevojojopebanuwowagogamu.pdfIn PDF document text
    • https://scalping.ir/data/files/file/79172273007.pdfIn PDF document text
    • http://goldia.cz/data/file/38582187859.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/74177023362.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/nifunefemimujebesofulu.pdfIn PDF document text
    • https://nada70.org/userfiles/file/mowepizemidavoxisogeri.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/77089768746.pdfIn PDF document text
    • https://underworldgear.com/admin/images/fckImg/file/wiful.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/rulokepudukiwofedonotusik.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://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_off0000c96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE182 11032 bytes
SHA-256: 33cf33654bd99f37a8d879190705b7119f4d5c3f49a10dc4fd1cedeceea3b91a
font_02_sfnt_off0000fb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB51 17672 bytes
SHA-256: a587384382950454e7de3260c97295cdebad549532ae4a6c1f09974c1731064c

Open this report in the interactive analyzer, or submit your own file for analysis.