Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe1afa4eabad073…

MALICIOUS

PDF

80.4 KB Created: 2021-05-12 09:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9a53514a12bca1db54c721b5c245541d SHA-1: 16b32aa1d6bab9cde43321ef601f20094e86b2d8 SHA-256: efe1afa4eabad073e822c556e357969b15915faf88b273f8bcf3b99b27dbbaa6
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 0.9998

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://jacksth.ru/strik?utm_term=how+to+set+up+a+spectrum+remote PDF link annotation
    • http://sujimelowakolop.medianewsonline.com/was_george_shooting_lennie_justified.pdfIn PDF document text
    • https://mexakogu.weebly.com/uploads/1/3/5/9/135981712/9902149.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/lgd9Xgh/home_exercises_to_lose_belly_fat.pdfIn PDF document text
    • https://towotadop.weebly.com/uploads/1/3/2/6/132682697/gasuzoxil_dadede_rekapitidudo.pdfIn PDF document text
    • https://luvikexixof.weebly.com/uploads/1/3/4/4/134481561/xibagos.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/geghhdr/un_point_de_plus_meaning_in_english.pdfIn PDF document text
    • https://panusefebile.weebly.com/uploads/1/3/5/3/135331690/8c5625fa32.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/uP5gjie/the_game_of_life_2_free.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/wererewumanisiveladi.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/43dqBSH/cooking_fever_hack_android_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/iOZjhih/80141713088.pdfIn PDF document text
    • https://cdn.sqhk.co/mekoposa/y6WXFha/jadosilovus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jewofeket.onlinewebshop.net/28516798913.pdfIn PDF document text
    • http://lowuguja.myartsonline.com/gyratory_crusher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd7b685-0e35-4b9f-8f0d-b5b062b15241/putajafugozuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a62d6f-cca7-493e-8030-ffc4a6ebe9d6/bofilotebux.pdfIn PDF document text
    • http://xekazaz.myartsonline.com/munugirokorevebagi.pdfIn PDF document text
    • http://kewevagisugimuw.onlinewebshop.net/16420337418.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/23223698740.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_off0000fca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA7 5100 bytes
SHA-256: 084c413d1c27da61a11c30c86176105d422c2fd43ed153d1a5a294d80a5bbbc6
font_01_sfnt_off00010df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF9 11548 bytes
SHA-256: 1bcee234f17d7505f11bae8aaa9e0a4963ceba861382217245c69e6b0c670757

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