Malicious PDF — malware analysis report

Static analysis result for SHA-256 f924ad6fc07d1f5e…

MALICIOUS

PDF

67.8 KB Created: 2020-12-09 06:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 22285d30f7f7d3d85968aa0c98752b8b SHA-1: 91e0a0a45fbb78d2902c90bac8d9f7eddb92715b SHA-256: f924ad6fc07d1f5e3f35ea5c36de955956795f0515bc83b3b8e4919561aa25fa
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-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://traffnew.ru/123?utm_term=naughty+christmas+cards+printable PDF link annotation
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/bc7bbc.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/ea24a6.pdfIn PDF document text
    • https://jedotulaxadetin.weebly.com/uploads/1/3/4/5/134587896/fipikegasi_ronelisomiko.pdfIn PDF document text
    • https://pazaduzot.weebly.com/uploads/1/3/4/4/134473777/vudufubegovevoruwuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377381/normal_5f9573fe537c3.pdfIn PDF document text
    • https://gokaveruziniva.weebly.com/uploads/1/3/4/5/134580144/b0f35fd0673d286.pdfIn PDF document text
    • https://puniduvete.weebly.com/uploads/1/3/4/3/134341297/169375.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/a7b88.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://s3.amazonaws.com/vezumobigodub/lakusekukareretit.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/moxezalibapikixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7bd97b-43c5-4e2e-b89d-4087d8de4278/propiedades_de_los_radicales.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/xufirubeda.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE72 5472 bytes
SHA-256: ce371340132605246804b225c1922487a2df2ace537fb2b0ca839f33f2f411a7
font_01_sfnt_off0000d0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E6 10396 bytes
SHA-256: 1a70d707601a593e1fadb46b46891278263278e72b3a52cb77e208d231d7cb74
font_02_sfnt_off0000f470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF470 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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