Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4bd3042c06adae…

MALICIOUS

PDF

108.1 KB Created: 2021-01-19 10:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6b71ec91e67cc651d635772e1e5384ca SHA-1: de6be46583d696e4acda487e855237f4d9e223b3 SHA-256: bd4bd3042c06adaee4a5bf57fdf56f29f358c5f09b1e6eebff59aca576bec555
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or redirection scheme. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection to these external URLs, which are the primary IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=tropicana+field+address+st+petersburg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416490/normal_5fae40f3938b3.pdfIn PDF document text
    • https://site-1168244.mozfiles.com/files/1168244/wikumixowazizemoriwuxi.pdfIn PDF document text
    • https://dimazupaw.weebly.com/uploads/1/3/2/8/132814154/5971100.pdfIn PDF document text
    • https://dironirodog.weebly.com/uploads/1/3/4/7/134760169/zinafamupanoz_javulup_bapifolimesago_monub.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/nofagukus.pdfIn PDF document text
    • https://zimemomikinipex.weebly.com/uploads/1/3/5/3/135347479/96bb66b.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/diruwaxivojox.pdfIn PDF document text
    • https://site-1180442.mozfiles.com/files/1180442/moto_z3_rear_camera_not_working.pdfIn PDF document text
    • https://pexafibilo.weebly.com/uploads/1/3/4/4/134484824/suvixikoketamimina.pdfIn PDF document text
    • https://fekamudubop.weebly.com/uploads/1/3/5/3/135325245/ad62fe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490371/normal_5fb62a2e99281.pdfIn PDF document text
    • https://nabodavovi.weebly.com/uploads/1/3/1/4/131406515/sarijov_finedidonutoj_jodexonofal_janijuliw.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_off00016662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16662 5412 bytes
SHA-256: f8c8c5a8a43c80386bc28b54107daea53d23403a36dc1ddf71cbef5b3aba7328
font_01_sfnt_off000178d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178D2 13100 bytes
SHA-256: 74d9396235a967edf256984bf53782fc2cd43fd4f0e31c6dd26b820dca27312b

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