Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfdfd72355a33d2…

MALICIOUS

PDF

46.6 KB Created: 2020-11-07 05:19:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 08238ecf1aa5f34b6f3e9b157a6b8fe4 SHA-1: 920333950d8dcafea10c2fa92b1ff3beda63e228 SHA-256: fcfdfd72355a33d208f67642159f5e80615a64af150b564954a54618019ffc42
66 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 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 1.0000

Heuristics 4

  • 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://trafffi.ru/aws?keyword=fram+oil+filter+lookup+catalog PDF link annotation
    • https://depatimuxuzox.weebly.com/uploads/1/3/4/4/134404048/2561119.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/1702611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f92bf6cd2111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f9875aa42b69.pdfIn PDF document text
    • https://zewuxufasebi.weebly.com/uploads/1/3/4/3/134320084/gotenuzodabe.pdfIn PDF document text
    • https://defugelunek.weebly.com/uploads/1/3/4/5/134524545/8746401.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://wiludilake.files.wordpress.com/2020/11/juzebogonevasagodazu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/texejume.pdfIn PDF document text
    • https://jazefev.files.wordpress.com/2020/11/62910332891.pdfIn PDF document text
    • https://jopijetiza.files.wordpress.com/2020/11/worifimijuj.pdfIn PDF document text
    • https://sozolid.files.wordpress.com/2020/11/the_palouse_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/673278e6-5776-4889-b024-b4a60f32960f/husky_power_washer_1750_gun.pdfIn PDF document text
    • https://pufelaneniw.files.wordpress.com/2020/11/astronomia_maya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd9b39a-5025-41db-a2f5-190a0fe9ae3d/d16y7_stock_internal_8_psi_tune_download.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_off00006ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC3 4952 bytes
SHA-256: 0910f2c3949faefa9cd58d5287462d89ee3a2329e671a3a9db36745ea7a0cecc
font_01_sfnt_off00007ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA6 10616 bytes
SHA-256: 94703d3102522d6d23bd4c1ba3d7af333fe82daeb3b28ed0a849e46a232113fa
font_02_sfnt_off00009fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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