Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0d379f23a61fce…

MALICIOUS

PDF

78.5 KB Created: 2021-05-10 13:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c6ccf8af36135fd36d7f7070d0b81e9e SHA-1: 22ea1396471ec5f62c92d04ff5a044b7957e5acc SHA-256: fb0d379f23a61fce2a2889ab61c1193878812dc10224e8bccbda0dbb0c98e61c
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/strik?utm_term=how+can+i+find+my+cra+account+number PDF link annotation
    • https://cdn.sqhk.co/fitodofafe/iicHhbo/18840609010.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/bcs_preparation_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/cjghcJP/54834877205.pdfIn PDF document text
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/02c77405803fb1b.pdfIn PDF document text
    • https://wukakokusaz.weebly.com/uploads/1/3/0/7/130739200/7be58a3.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/VPshhgf/xireboboxukafeguvor.pdfIn PDF document text
    • https://cdn.sqhk.co/jilelemo/hdQAAck/fovadaz.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/gimudonebojibilaxusizawu.pdfIn PDF document text
    • https://gikapatom.weebly.com/uploads/1/3/4/0/134042778/nakadejebix.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/o_significado_dos_versculos_do_alcoro_sagrado.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/tobew-visawo.pdfIn PDF document text
    • https://senejudav.weebly.com/uploads/1/3/5/3/135348848/lemipopo_nakotad.pdfIn PDF document text
    • http://beremoter.online/bidabizagumesodulip31v3f.pdfIn PDF document text
    • http://mists.space/download_joox_for_laptopxlzgo.pdfIn PDF document text
    • https://cdn.sqhk.co/kebabefepu/XmZWgcq/best_bodybuilder_photos.pdfIn PDF document text
    • https://pegupirorig.weebly.com/uploads/1/3/1/4/131406852/f9876622ec6d.pdfIn PDF document text
    • https://vokidasurodetax.weebly.com/uploads/1/3/6/0/136089353/114f37ae344c6.pdfIn PDF document text
    • http://italy50wow.pro/what_jobs_can_i_do_with_an_accounting_and_finance_degreewycwk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xiwexuxe.atwebpages.com/xepopatagalijo.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/76804130261.pdfIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_83432e5005fe4c8787f000186b313802.pdf?index=trueIn PDF document text
    • https://9e4d96d7-92f1-4145-9aac-d1976e75dfe6.filesusr.com/ugd/49a98b_ee43721edcd14a9cb2f2f775e2e0bd2c.pdf?index=trueIn PDF document text
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_c308c1306ed747708ebd93097fa6736d.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_a828d5c5817c49e2962d6ff09ec05892.pdf?index=trueIn 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_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 5252 bytes
SHA-256: 293773f3060c8e0d6179a02a48d86e5aef4bf3485a2d9522551966fb0d50cc55
font_01_sfnt_off000106ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AD 11128 bytes
SHA-256: c7d7d0ae829c2cca9277d67e2f991189d989f62571f7a272318025467ee2f89a