Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a6e25f1f93994ae…

MALICIOUS

PDF

100.3 KB Created: 2021-04-29 20:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3c1cba52bcb52435b95e38eb2136d93 SHA-1: 96b6265ba577cd8455962032ef182c0cab3085de SHA-256: 7a6e25f1f93994ae384000d481a39d82c67476ee56ed14db1309150239d14823
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing. One prominent link directs to 'dugedepap.ru/strik', which appears to be a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

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://dugedepap.ru/strik?utm_term=where+is+the+battery+on+irobot+roomba
    • https://razamilijukiw.weebly.com/uploads/1/3/4/8/134879964/4938436.pdf
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/1440984.pdf
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/romulos.pdf
    • https://poxefapujo.weebly.com/uploads/1/3/5/3/135312596/8756878.pdf
    • https://velawavasikene.weebly.com/uploads/1/3/5/4/135400921/kokibekipem-lipogedogive-jitakog-litalesilax.pdf
    • https://cdn-cms.f-static.net/uploads/4370055/normal_601d0730bb49d.pdf
    • https://static.s123-cdn-static.com/uploads/4391308/normal_5ff96415b4432.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mexijegedakol/what_is_god_saying_about_fear.pdf
    • https://s3.amazonaws.com/tesotiwapax/nizanetorizipubovig.pdf
    • https://s3.amazonaws.com/pasawe/zapivumimun.pdf
    • https://s3.amazonaws.com/fejakixoweka/abacus_d125_16_alarm_manual.pdf
    • https://s3.amazonaws.com/nefunupu/krishna_bhajan_video_song.pdf
    • https://s3.amazonaws.com/degisapemifa/audioquest_dragonfly_android_compatibility.pdf
    • https://uploads.strikinglycdn.com/files/4873e8dc-429b-4672-8f6d-7c3d13afb852/7348821577.pdf
    • https://uploads.strikinglycdn.com/files/4e157993-7b87-4fd4-9c4f-cfa796977f15/which_functions_graph_has_asymptotes_located_at_the_values_x.pdf
    • https://s3.amazonaws.com/nilafafakem/wumubokafubibaref.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001346b.bin
87d1f5ca1c102b7fe17ce221b0b037a0445f33ea3a4d9c7923c1401cbf5fa216		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1346B 5148 bytes
font_01_sfnt_off000145d4.bin
98c39d61eba89bbfd1635f36b35e624ff2e8fad6dc7ed6cd471360fd79609ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145D4 11936 bytes
font_02_sfnt_off00016eb3.bin
e5245523bd71a78e06ca3300da63f55ad096e28dd8c1a5e83e138be64f7d0aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16EB3 16084 bytes

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