Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20086a2863fb581…

MALICIOUS

PDF

68.9 KB Created: 2020-11-18 06:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c83ccbae66d6ea30f6e91aa096a608f7 SHA-1: d5f39262934899943bb8366ea9f603b93e97e99a SHA-256: f20086a2863fb581eb6b34006d6de1ebb7442bd7417fcf30b2798f2796d271a1
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, suggests a lure related to "fractured fairy tale ideas for cinderella". The presence of external URIs and the link farm heuristic strongly indicate a phishing or scam attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=fractured+fairy+tale+ideas+for+cinderella
    • https://bimenejujuw.weebly.com/uploads/1/3/4/5/134592033/299da45b1e5.pdf
    • https://cdn-cms.f-static.net/uploads/4408346/normal_5f92c5a211ae8.pdf
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f951802010ba.pdf
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/33a253da20bd0.pdf
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5fa0581de0a43.pdf
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5f8ef6aa291aa.pdf
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/56579854c7a.pdf
    • https://likuxosudiva.weebly.com/uploads/1/3/4/6/134603152/6882399.pdf
    • https://cdn-cms.f-static.net/uploads/4454545/normal_5fa197caed7c2.pdf
    • https://cdn-cms.f-static.net/uploads/4501364/normal_5fac513f5cc03.pdf
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/nozetipatubapoxeno.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2b61d983-3c6e-454d-ba73-7721e5240364/wufosavefefe.pdf
    • https://uploads.strikinglycdn.com/files/533c7add-b0cf-478f-b057-17a14d289c9c/bakurotikomap.pdf
    • https://uploads.strikinglycdn.com/files/49f05b76-f8db-4c54-ad0b-d09a966b1a31/pizabolazuga.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5b6.bin
0c6aa6cba6db5170f83f0b3554beb9e6685136d6ec223312e444220f28ae3082
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B6 4952 bytes
font_01_sfnt_off0000d6a0.bin
94ed016d798389a38c46e5519e4ffe226d90b238a57331cdd93d87d13add8e9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A0 9956 bytes
font_02_sfnt_off0000f8bc.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 4324 bytes