Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbb794b12a48209…

MALICIOUS

PDF

109.3 KB Created: 2021-02-22 07:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bbb165cf0125cfb487352059cb01133e SHA-1: 8b3dcc05a06b6b409f28c40304cba2d7237a7378 SHA-256: dcbb794b12a48209029b5d16a9ad8abba3b720834c0abd1725f9a26d54c094df
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. 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 numerous external links are indicative of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=cricut+explore+air+2+user+manual+pdf PDF link annotation
    • http://hookup157.fun/4336740274139k9a.pdfIn PDF document text
    • https://tumulole.weebly.com/uploads/1/3/6/0/136054957/mifofujamupira_zilewilijom_tedab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483349/normal_6025935556b8e.pdfIn PDF document text
    • http://epaytds.xyz/como_hacer_una_hoja_de_vida_actual_2020nt30k.pdfIn PDF document text
    • http://yatvoyya.fun/kumuxawelibvm241.pdfIn PDF document text
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/6557383.pdfIn PDF document text
    • http://vknart.xyz/armed_forces_compensation_scheme_claim_formd8re8.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/jemoxirimor_xifoworodo_taroxavoregep.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/sofojanelewopig68ica.pdfIn PDF document text
    • https://xizuxikeg.weebly.com/uploads/1/3/0/7/130740292/1639007.pdfIn PDF document text
    • http://carishr.com/infrastructure_development_in_south_africaxd0uy.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/3dd28efadbc.pdfIn PDF document text
    • https://zunenevalomedo.weebly.com/uploads/1/3/4/8/134855990/6284487.pdfIn PDF document text
    • http://hookup157.site/4839824224117jf3.pdfIn PDF document text
    • http://cooldomen.space/how_to_use_offset_in_autocada2i4w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471690/normal_602dd1777e68c.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_off00016deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DEB 5408 bytes
SHA-256: 6f31960db7582a9e432c7d61e5c9c5b68db6142c5525d6cdf281128d67016da6
font_01_sfnt_off0001803a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1803A 11468 bytes
SHA-256: e8c8a2aa2830de3b3bca083602f3d00d612db0c302923db38330a35e09f501ac

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