Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafee0ecdbdf576d…

MALICIOUS

PDF

61.0 KB Created: 2020-11-19 16:14:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5c9ec3a15f78b7640576abf77a94c5cf SHA-1: b07b1166bfa01838552575475a783ed24329a7e9 SHA-256: fafee0ecdbdf576df198487661d011c0ab18784b488e0bfd30792485429c6e26
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URIs pointing to various domains, likely for SEO manipulation or to host phishing content. The presence of multiple disposable hosting domains and UTM parameters in URLs suggests a coordinated effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/123?utm_term=swiss+military+watch+hanowa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fb497ebc5ec6.pdfIn PDF document text
    • https://kejifesabateg.weebly.com/uploads/1/3/4/8/134847793/6519394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_5f9c6845522f7.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/wozitevajurifa-rametafe-pubunuxujuremoj-xunix.pdfIn PDF document text
    • https://komakuzafoge.weebly.com/uploads/1/3/4/5/134576335/fipumojokepaxi_modekopewexawov_gixero.pdfIn PDF document text
    • https://guvodirafed.weebly.com/uploads/1/3/4/4/134475496/8adb28eecda.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/tipuv_wejav_vagodavajose.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/litamagul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5f900017d1a53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb30f184-77f7-4ed7-8de7-e5ee5248c768/84454040519.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/restaurants_in_illinois_reopening.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/92140763846.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC5 5336 bytes
SHA-256: 59beebc4231e34ec92e12bd3342e85b2822f852f26698bb804a233d4da0efe0a
font_01_sfnt_off0000c1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D3 11420 bytes
SHA-256: 6def5abd6d15822cee9f9e85b600f9b8b30420d55c0a60973bb754f5d95d3e48

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