Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dda93df5dffd6b9…

MALICIOUS

PDF

72.5 KB Created: 2021-02-14 08:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f17e3c81faa756c1bb12086d4a464f0d SHA-1: ae0a447aa797696c81c47cb0cff531bda6f96b16 SHA-256: 8dda93df5dffd6b9d31f047e4c949deb79ca4ced46590f34cc3e71c3dcfe8200
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://crophysi.ru/wix?keyword=bob+verne+wiki PDF link annotation
    • https://kenuzoba.weebly.com/uploads/1/3/4/0/134017938/jewuludaguximofunov.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/5674052.pdfIn PDF document text
    • http://sidawiw.iblogger.org/12168022349.pdfIn PDF document text
    • https://wabirigiraziw.weebly.com/uploads/1/3/6/0/136017191/lovenoroxowal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407997/normal_5ff89c4bb696a.pdfIn PDF document text
    • https://tomasuniraruz.weebly.com/uploads/1/3/5/3/135392941/soparoru_vimegavegix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_600f7899a93d2.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/renowa_baxazebet_natatit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480582/normal_5fcb708520a8c.pdfIn PDF document text
    • http://tapadobav.iblogger.org/vufusipiwelezorut.pdfIn PDF document text
    • https://ponorevex.weebly.com/uploads/1/3/1/3/131398269/a84e3e9480.pdfIn PDF document text
    • http://podeves.xyz/aircrack-_ng_for_android_without_rootofr8z.pdfIn PDF document text
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/6977331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462986/normal_5ff037e9ae4bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475570/normal_5fea27a7b2f85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rowagaparik.rf.gd/fufenamuxumakef.pdfIn PDF document text
    • http://palipesokugukux.epizy.com/answer_synonym_formal.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_off0000e1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D8 4664 bytes
SHA-256: 469c5618034a0ffb893992b5f94a0e805033080c7f0a66822077e83d9dfc3e95
font_01_sfnt_off0000f1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E3 10764 bytes
SHA-256: 81bb957f14a33ad44cd5b16e4cb6c3fb6591b482546a5251be4e1a466331e7bd

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