Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa139ef8a1ba87b…

MALICIOUS

PDF

103.4 KB Created: 2021-02-22 09:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bd418aaabe7e1094cfe2a8ebde3ab5f5 SHA-1: 91d6773c19d7355e0a252db32b78ec69423786f1 SHA-256: 6fa139ef8a1ba87b43641b35921444d276276a05932ac2348ae9add3d00ce9b8
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/wix?keyword=ging+gang+goolie+dance+steps PDF link annotation
    • https://femixazate.weebly.com/uploads/1/3/4/3/134363246/a03be1a69d29.pdfIn PDF document text
    • http://usblighter24.site/mudapanip1q9fb.pdfIn PDF document text
    • http://sehq.xyz/sonibepototobovirozewafems8sb1.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/hihhiZ0/cute_cartoon_wallpapers_hd.pdfIn PDF document text
    • http://znasila.ru/sagoputukhgat1.pdfIn PDF document text
    • https://pajarozexukonom.weebly.com/uploads/1/3/1/4/131437235/bidapokuba-gusijafolaza-punokubojo-rarukat.pdfIn PDF document text
    • https://negozikazaseju.weebly.com/uploads/1/3/4/5/134587396/jefaloruzoxaz-vajexiwosiko-rizikujezet.pdfIn PDF document text
    • https://sawolopu.weebly.com/uploads/1/3/6/0/136049845/6a4f96effc9b642.pdfIn PDF document text
    • https://jitugitux.weebly.com/uploads/1/3/0/7/130740190/724e0.pdfIn PDF document text
    • https://fuvedomuwipiw.weebly.com/uploads/1/3/1/6/131636935/8ec4fe06d7a623d.pdfIn PDF document text
    • http://copyrightproblem.com/the_measure_of_man_book1r22s.pdfIn PDF document text
    • http://hydrofthol.space/27378571153575ug.pdfIn PDF document text
    • https://rifodajawu.weebly.com/uploads/1/3/0/7/130739776/pulabekero.pdfIn PDF document text
    • http://vittorguxx.site/femuvunodukuvezaroruwilcaifi.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/Ribjdia/juxutezixugimuregekopego.pdfIn PDF document text
    • https://susuravi.weebly.com/uploads/1/3/1/1/131164319/a96a54.pdfIn PDF document text
    • https://pawusavexamase.weebly.com/uploads/1/3/0/8/130813618/redewufirenu_xuzelime.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/4439787.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/Miiihic/zudeluko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00015884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15884 5176 bytes
SHA-256: f9895c62123c1b93e07ef77145e95ac98ca3d2734cd1750ce1065839c5656b40
font_01_sfnt_off00016a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A38 11084 bytes
SHA-256: 2c4be5f1d7f7095a9866ccc69633f28586da6ff8202fd15575da5bc4f9a96062

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