Malicious PDF — malware analysis report

Static analysis result for SHA-256 e415045b1cf568ed…

MALICIOUS

PDF

76.7 KB Created: 2021-03-15 20:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1231cba2bef828fb17de6c69ab7852e1 SHA-1: 7213ba8f9026eb01906079a46845337a51d6f22f SHA-256: e415045b1cf568ed175a2dbde5a304bdfd75dbc3737cce08e7a655dc687e8cd3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in phishing or SEO spam campaigns to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=gretel+and+hansel+2020+trailer
    • http://faxusigeroles.sportsontheweb.net/physics_equations_of_motion_calculator.pdf
    • https://susulipazelavig.weebly.com/uploads/1/3/5/3/135335994/9305525.pdf
    • http://fazejajogavu.medianewsonline.com/bixetedotemowaxuriv.pdf
    • http://zozuxeperu.22web.org/fugizuzerugefu.pdf
    • http://bitalotava.scienceontheweb.net/fallout_3_wasteland_survival_guide_best_answers.pdf
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5ff679892d0f0.pdf
    • https://cdn-cms.f-static.net/uploads/4417423/normal_60434c976e290.pdf
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/3ed73.pdf
    • http://kujamemapevubu.mypressonline.com/what_is_type_h_transmission_fluid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wemazun/how_to_train_chest_with_ac_joint_injury.pdf
    • https://s3.amazonaws.com/vibasujefir/99455562914.pdf
    • https://s3.amazonaws.com/jimugivos/33397759020.pdf
    • https://s3.amazonaws.com/pogolo/wagafupezizew.pdf
    • https://s3.amazonaws.com/tobojelusiwi/asteroid_belt_information_nasa.pdf
    • https://s3.amazonaws.com/sosupejuxofedo/65668261241.pdf
    • http://zewivijususilub.epizy.com/12322367258.pdf
    • https://s3.amazonaws.com/kovozenamofox/dolepawosog.pdf
    • https://s3.amazonaws.com/luworizesupox/android_tv_airplay_2018.pdf
    • http://torejejowomu.myartsonline.com/49115886713.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae5.bin
7ee321c07277807dffd1bbb981b323d3589ce72c11f8d49674a03696f4439fc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 5220 bytes
font_01_sfnt_off0000fc95.bin
f8e7587c05eca781868228092dec5ceaaa12701b6ee163677cdbb143c0a5269c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 12320 bytes

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