Malicious PDF — malware analysis report

Static analysis result for SHA-256 c789bff1e423e74d…

MALICIOUS

PDF

69.1 KB Created: 2020-11-26 00:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 154c52eb4b460ac2c1ee29799c06846d SHA-1: c37767c2fca343d73c0e9fe5ab22609e027c2d56 SHA-256: c789bff1e423e74d004c10236b392c528b86c2e479d827f52e204f8cef1551e0
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=how+to+mod+a+ps3+gta+5 PDF link annotation
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/2567eb07cd.pdfIn PDF document text
    • https://rukewopesix.weebly.com/uploads/1/3/4/2/134266340/milimifefo.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/zijezixoxo-bipugoguwe-wepezajodezo.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/7951693.pdfIn PDF document text
    • https://sidunaxegizu.weebly.com/uploads/1/3/0/7/130776644/kibak-dugexibezori-joror-kemejuwileseno.pdfIn PDF document text
    • https://janokapaw.weebly.com/uploads/1/3/4/3/134329878/munupetobakir.pdfIn PDF document text
    • https://beretukajawedu.weebly.com/uploads/1/3/4/7/134713042/dakixosi-voxadeg-bomatejelazu-siduw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f376a6e3-d14d-4d64-9d93-246881775b09/descargar_el_agua_champeta_mp3_conve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57869ec-2094-49b3-9a59-23de4fab6fac/xomewesenugiwisalagovuze.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/wudanivexipuvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9648d4a-cf12-4682-bb5a-d2b9fb37c458/keil_and_delitzsch_commentary.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC679 5008 bytes
SHA-256: c4ec655d1d9d871e321fae7c643f40a6055389732887611766f79598c3bbe4b5
font_01_sfnt_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 10032 bytes
SHA-256: 4682d14dcab2070d95a788d28674aa9a2084076045c3349c883d7a35884b881b
font_02_sfnt_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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