Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b09ef3ab245770c…

MALICIOUS

PDF

76.6 KB Created: 2021-03-20 13:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae575e8161471c7f4700b78563f43ae SHA-1: 7992cff9467eacbd42fb0b0b7d9b068ae2f8a55b SHA-256: 6b09ef3ab245770c908dcf70ec96304f126b578e8558566a1826b8b96ca38e18
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'Acls provider manual ebook'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • 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://dafemum.ru/wix?keyword=acls+provider+manual+ebook
    • http://kunepuvobimamin.medianewsonline.com/house_rent_agreement_format_in_malayalam.pdf
    • https://cdn-cms.f-static.net/uploads/4450641/normal_600d1514efdc4.pdf
    • http://pimesizawox.sportsontheweb.net/rojovik.pdf
    • https://cdn-cms.f-static.net/uploads/4401525/normal_602e6727c982e.pdf
    • https://cdn-cms.f-static.net/uploads/4487658/normal_604b3946497d7.pdf
    • https://static.s123-cdn-static.com/uploads/4481518/normal_60077268b5a8e.pdf
    • http://pazadixokumox.sportsontheweb.net/how_to_adjust_needle_on_singer_sewing_machine.pdf
    • http://nigoguno.scienceontheweb.net/majaferosumofava.pdf
    • https://cdn-cms.f-static.net/uploads/4489404/normal_5fd1a330aafb0.pdf
    • https://cdn-cms.f-static.net/uploads/4394073/normal_6050d2880d226.pdf
    • https://static.s123-cdn-static.com/uploads/4393179/normal_6006d58fccc76.pdf
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5fdfb07794b94.pdf
    • http://naliputa.mywebcommunity.org/ipg_carmaker_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4486563/normal_604dccfc0770a.pdf
    • https://cdn-cms.f-static.net/uploads/4466154/normal_603942a70b858.pdf
    • https://cdn-cms.f-static.net/uploads/4458838/normal_5fe8a6883ff4e.pdf
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fe50924d496a.pdf
    • http://wativeb.mypressonline.com/10308936281.pdf
    • https://cdn-cms.f-static.net/uploads/4391317/normal_601097697a1ab.pdf
    • https://static.s123-cdn-static.com/uploads/4392660/normal_5fe41c661e3d5.pdf
    • https://static.s123-cdn-static.com/uploads/4486034/normal_6001d15477c2b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fuzafuzeruwit/vumobagepotakixemimo.pdf
    • http://kivozusemu.atwebpages.com/what_is_the_maximum_weight_for_a_baby_car_seat.pdf
    • https://s3.amazonaws.com/jadudusujuje/nefubepubejerupu.pdf
    • http://powagamojij.onlinewebshop.net/raxanolubifugujebebulexo.pdf
    • http://pigutun.myartsonline.com/82961001202.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_off0000ea3f.bin
7b933ecb579c0597b805a164ed5c954139176874284a10767aa3bfdd8a70064f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3F 5472 bytes
font_01_sfnt_off0000fcc7.bin
769475ac593ccf2336ae3ff5ba5d2d7e56570a112211f9d1c5a9d3470750533b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC7 11668 bytes

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