Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b8d7b06b5b5fdb…

MALICIOUS

PDF

79.5 KB Created: 2021-03-21 07:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56a5fbac0adafbeee2d232bbba54535d SHA-1: 540ade33f49685f99358d02a1335f9bb0a119b66 SHA-256: e0b8d7b06b5b5fdb36a75ef99fc570c63543540d994ba12166a45e1b5677b808
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URL suggests a lure to a website disguised as a search result for a camper manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://pelibifir.ru/wix?keyword=coleman+westlake+pop+up+camper+manual
    • https://kimivatebuxokas.weebly.com/uploads/1/3/4/7/134702804/rugozufejebax_konaxidosilopu.pdf
    • http://dujojiwasemob.mywebcommunity.org/coleman_mach_rv_air_conditioner_shroud.pdf
    • https://cdn-cms.f-static.net/uploads/4379848/normal_6047905c26304.pdf
    • http://jarevine.mywebcommunity.org/all_formulas_of_maths_class_11.pdf
    • https://bokupotanija.weebly.com/uploads/1/3/5/9/135995636/tobezolobojo.pdf
    • http://fidofawi.medianewsonline.com/69483039334.pdf
    • https://cdn-cms.f-static.net/uploads/4474992/normal_5fd7169679659.pdf
    • https://komupexe.weebly.com/uploads/1/3/4/4/134462920/4aad7c88ba78.pdf
    • https://cdn-cms.f-static.net/uploads/4367631/normal_600d47550a79e.pdf
    • https://cdn-cms.f-static.net/uploads/4426955/normal_602de6964af6d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0555c64a-0343-49cb-8260-2fa5f864f307/formulas_volumenes_de_cuerpos_geometricos.pdf
    • https://uploads.strikinglycdn.com/files/91e7fccc-6898-4e13-9551-28b954509cfe/burning_red_rash_on_legs.pdf
    • https://uploads.strikinglycdn.com/files/76ab309d-8130-4c75-8592-5804c06ba8fa/adele_sheet_music_piano.pdf
    • https://s3.amazonaws.com/lebejos/konofisaxasulazonidebew.pdf
    • https://uploads.strikinglycdn.com/files/b6fee320-7ded-4e46-b404-051eb0d758a4/papupirefugel.pdf
    • https://uploads.strikinglycdn.com/files/cf2e00f0-57a1-4587-a493-406ca40b62a5/gikuzib.pdf
    • http://diwavubodinaroj.myartsonline.com/96328130787.pdf
    • https://s3.amazonaws.com/ditiruz/samsung_j5_prime_bootloader.pdf
    • https://uploads.strikinglycdn.com/files/a2758255-810f-44a6-97b0-0d9027437162/folexederadipufo.pdf
    • https://s3.amazonaws.com/voxipanovigepiv/jowett_javelin_buyers_guide.pdf
    • http://fedonefekipide.myartsonline.com/18925784818.pdf
    • https://uploads.strikinglycdn.com/files/7e3c558a-f1ab-41a0-b3a3-b18b7b7e3c6e/51862317311.pdf
    • https://uploads.strikinglycdn.com/files/25d75418-8fa4-46ab-8413-69e945cbfb25/how_can_students_improve_time_management_skills.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_off0000f68c.bin
bc49505ac2b028e36e30d6e3760ebd1f22d84c6449238c51867bd5aa8a99a2d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF68C 5140 bytes
font_01_sfnt_off000107fe.bin
88d3f54259a005a062ccc06a4a1519becb91ef058aaf802f620717c39366adad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 12168 bytes

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