Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a554eaa3d9c224…

MALICIOUS

PDF

64.0 KB Created: 2021-02-17 05:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6ed6a31539a2a9fbe839fec9426e39ca SHA-1: 1a3f98989777392df3619fc3d7c50ff4d672e2f6 SHA-256: a0a554eaa3d9c224f29f4916a90868a73a7198c2eccea239f33e5127f95166c2
182 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by multiple heuristics, including critical alerts for malicious redirector links and ML classification. The embedded URLs point to known malicious infrastructure and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of common techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=sony+ps-lx300+turntable+review In PDF document text
    • http://artrosil.xyz/wonuza9z6xl.pdfIn PDF document text
    • https://ruvatekokero.weebly.com/uploads/1/3/1/4/131437102/4504234.pdfIn PDF document text
    • https://zopizegojuv.weebly.com/uploads/1/3/1/3/131380511/33797b7ceb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5fd78a7139322.pdfIn PDF document text
    • http://vipmanmarket.space/54717629507jc6hp.pdfIn PDF document text
    • http://pixelbarista.com/loctite_243_safety_data_sheet8phxj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_60129d5f7da4d.pdfIn PDF document text
    • http://sberpodarok2020.online/setotolelifoxopafirazibotgia2n.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/c7afd91ed.pdfIn PDF document text
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/3550083285368f0.pdfIn PDF document text
    • http://pijakonojimuw.iblogger.org/fortnite_battle_royale_game_size.pdfIn PDF document text
    • http://renijulemigato.iblogger.org/9414931884.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416321/normal_5ff24a7b361b8.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/nevagexukogi-bekuda-wujapa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451949/normal_5fc7a839c9a1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/app_cache_cleaner_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/senadevezazese.pdfIn PDF document text
    • http://migepelulu.epizy.com/celebrate_jesus_celebrate_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/2017_chrysler_pacifica_hybrid_user_manual.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 5716 bytes
SHA-256: 1c5941236f350fb2ebc13f4b14b29ccd09c9bd6b34cc2bf6b6ce58ab40268df3

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