Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f648ac0d5fb27a3…

MALICIOUS

PDF

83.9 KB Created: 2021-03-20 19:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e81092e94e47453fc84b6940abfdea6b SHA-1: 126ac56db88981c52a863a6b78fd5eb7927e2751 SHA-256: 6f648ac0d5fb27a3fa68bcf270cbf05a3f71df246ef0cff74a4be71f4c4b8667
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to 'dafemum.ru' suggests an attempt to redirect the user to a potentially harmful website. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://dafemum.ru/aws?utm_term=can+vegetarians+build+muscle
    • http://gekifek.scienceontheweb.net/koxezilijabobakerewotono.pdf
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/49cf7e5d06.pdf
    • http://gijaziveved.iblogger.org/zetuzudixuranegubawo.pdf
    • http://wivevadevenumet.mywebcommunity.org/wavelet_neural_network.pdf
    • https://pakajifovajopif.weebly.com/uploads/1/3/1/6/131607230/814795.pdf
    • http://vefipitop.22web.org/alien_shooter_td_mod_apk_unlimited_money.pdf
    • https://petizigosi.weebly.com/uploads/1/3/4/9/134903326/pixajezodadiro_pasavodomajakef.pdf
    • https://cdn-cms.f-static.net/uploads/4417815/normal_603bcfd82de0a.pdf
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/0c8b6a3f.pdf
    • http://mekujoviwe.mypressonline.com/20003513636.pdf
    • https://bisutofudumi.weebly.com/uploads/1/3/4/6/134663563/vaxawi-sosif.pdf
    • http://xajekuk.22web.org/br_shafi_new_videos.pdf
    • https://cdn-cms.f-static.net/uploads/4505363/normal_60536801a3c8e.pdf
    • https://static.s123-cdn-static.com/uploads/4455901/normal_6008803bb80f8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jepuvituxog.rf.gd/bagabakireloloravera.pdf
    • http://nurujoxarim.epizy.com/tumor_adneksa_adalah.pdf
    • https://s3.amazonaws.com/paxunu/85555640283.pdf
    • https://s3.amazonaws.com/fadadedezeker/developing_android_applications_with_java_eclipse.pdf
    • https://s3.amazonaws.com/jadudusujuje/shankara_spb_song.pdf
    • https://s3.amazonaws.com/leributafa/sabbath_school_study_guide_lesson_6.pdf
    • http://nevabaza.atwebpages.com/figunagas.pdf
    • http://penobugixova.atwebpages.com/scientific_hindu_astrology.pdf
    • http://fisumude.rf.gd/5367842183.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_off00010b7a.bin
5c56907ca1d74679de730b97500f533ee13b0e17cd799f978d7e3ba6154c56da
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7A 5364 bytes
font_01_sfnt_off00011da2.bin
0dcb3c4ad8ce03d1dc6d71edbfc429f8997edbef8fd821376b412c4a76f6ce53
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA2 10768 bytes