Malicious PDF — malware analysis report

Static analysis result for SHA-256 af310cbe9ce19fa6…

MALICIOUS

PDF

78.8 KB Created: 2021-03-10 22:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db8cf8aaead41da7dac1f3781054aeec SHA-1: 5278f655867a9c6153fbb3060f65a323865bd7fc SHA-256: af310cbe9ce19fa6b84f43d83c6e619f896e63cc6bb3b36d2c8d671ed3f23f51
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. An embedded URI points to 'dafemum.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to 'pressure cooker parts', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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/aws?utm_term=mirro+pressure+cooker+parts+m-0512
    • https://static.s123-cdn-static.com/uploads/4480884/normal_5ffc8de39f2fc.pdf
    • https://cdn-cms.f-static.net/uploads/4426972/normal_6038f3130a821.pdf
    • https://static.s123-cdn-static.com/uploads/4418777/normal_5ffb0cff711fb.pdf
    • https://static.s123-cdn-static.com/uploads/4371791/normal_5fdeb180650c3.pdf
    • https://cdn-cms.f-static.net/uploads/4422136/normal_6025f3a6dd085.pdf
    • https://cdn-cms.f-static.net/uploads/4501193/normal_601982bda8598.pdf
    • https://cdn-cms.f-static.net/uploads/4367646/normal_60220e1021eed.pdf
    • https://static.s123-cdn-static.com/uploads/4383314/normal_5ff693b5510fc.pdf
    • https://static.s123-cdn-static.com/uploads/4495696/normal_5fcb1e7869629.pdf
    • https://cdn-cms.f-static.net/uploads/4416938/normal_5fd6a0cf1cd0d.pdf
    • https://cdn-cms.f-static.net/uploads/4416143/normal_6047378f2175a.pdf
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5fe18ce4e42c8.pdf
    • https://cdn-cms.f-static.net/uploads/4486220/normal_60258d7f036dc.pdf
    • https://static.s123-cdn-static.com/uploads/4408879/normal_5ff522f9345e0.pdf
    • https://cdn-cms.f-static.net/uploads/4387417/normal_603f59c9b7d17.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jotizifime/29083812114.pdf
    • https://s3.amazonaws.com/wixanarer/baduta.pdf
    • https://s3.amazonaws.com/vasofirida/fefewonidezigi.pdf
    • https://s3.amazonaws.com/mexesazaxasa/sevewepuzudutize.pdf
    • https://s3.amazonaws.com/megujobemegor/naxunibopimigexep.pdf
    • https://s3.amazonaws.com/ropuba/free_consumer_reports_canada_vacuum_cleaners.pdf
    • https://s3.amazonaws.com/minabiwa/anti_terrorism_shooter_unlimited_money.pdf
    • http://pevivudawof.epizy.com/7354885833.pdf
    • https://s3.amazonaws.com/dogazisuze/32081082485.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/basic_html5_form_template.pdf
    • http://fojufofe.rf.gd/nuevo_uniforme_del_atletico_san_luis_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90f.bin
797416570598dc78c7ff81a29273cf79b10da4d85b6e857e039d841ed8fbbd69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 5376 bytes
font_01_sfnt_off0000fb73.bin
ae552b6926489dbe7fe029563b5c7e9f6347e256f20a7c323881a89db84521d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 10564 bytes
font_02_sfnt_off00011f62.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F62 4324 bytes

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