Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b13203a05147981…

MALICIOUS

PDF

80.2 KB Created: 2021-03-22 05:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 170c4bf190d3e1bfd96fc47a8045a828 SHA-1: a18f82cd53d9b9cd3712468c01f829c08ac19f9e SHA-256: 7b13203a051479816d2e08cf5421075fa65ac8dd8d396ec4206377dba362a50b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV detection and ML classification confirm its malicious nature. While no scripts were extracted, the presence of numerous external URLs indicates a likely attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=devil%2527+s+advocate+book+pdf
    • https://cdn.sqhk.co/rodofusavivi/wgijio8/frontotemporal_dementia_ftd_stages.pdf
    • http://gatofupimekow.mywebcommunity.org/becoming_a_supple_leopard_2nd_edition.pdf
    • https://mupililoxer.weebly.com/uploads/1/3/5/3/135302313/sisesamaz.pdf
    • https://cdn.sqhk.co/datimemovuko/3Svb1Ug/fofovepanabunixalomad.pdf
    • http://rarubife.mygamesonline.org/sofalisivokagub.pdf
    • https://cdn.sqhk.co/tobowovum/3kAijyy/play_l2r_class_guide.pdf
    • http://nunesop.scienceontheweb.net/hunger_games_vol_1_ita.pdf
    • http://lojupubevodi.22web.org/79588526126.pdf
    • https://cdn.sqhk.co/kaxejelun/3Hra7pI/simple_background_changer_apk.pdf
    • http://pumexewutide.22web.org/jidonimobemud.pdf
    • https://wifiluguzuz.weebly.com/uploads/1/3/1/4/131437957/lufadibokozemub.pdf
    • https://cdn.sqhk.co/gugusobazu/0ibKgci/25618662805.pdf
    • https://kiwaluraxipexe.weebly.com/uploads/1/3/5/3/135326690/7635640.pdf
    • http://sufulilutidake.mypressonline.com/jalikidubisinaxezexi.pdf
    • https://jumomemokipus.weebly.com/uploads/1/3/0/8/130874307/9677571.pdf
    • https://cdn.sqhk.co/dilujuzaga/dBirakQ/cyberfoot_2007_download.pdf
    • http://lamaded.mywebcommunity.org/94725943316.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zirudose.epizy.com/christmas_song_parody_lyrics.pdf
    • http://puredaw.rf.gd/how_to_use_a_holmes_humidifier.pdf
    • http://pizitibasowu.atwebpages.com/what_does_a_storyboard_do.pdf
    • http://falufobi.epizy.com/59443112314.pdf
    • http://kususen.myartsonline.com/71152120572.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_off0000ed95.bin
f7a42954c9b77eda4df6d4400801aa86d20aa7a23e9dae02c7bc784420f7e4c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED95 5032 bytes
font_01_sfnt_off0000fed4.bin
df3f887c2707b390a7a12fce8c04eef1c97e57af833a459194ac3e87cf090f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED4 11448 bytes
font_02_sfnt_off00012560.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12560 4324 bytes

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