Malicious PDF — malware analysis report

Static analysis result for SHA-256 213f802a2b347a8c…

MALICIOUS

PDF

77.1 KB Created: 2021-05-08 13:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0d6182f255fcb2eeff4bc2190f2b8e66 SHA-1: a864ce1b7072bbbc3b07921404be930ba58a1feb SHA-256: 213f802a2b347a8cb61c39cc839373d8021cbeb807c6e738837a00ba9ff0ed7d
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, likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=how+do+i+connect+my+fios+router+to+an+ethernet+cable PDF link annotation
    • http://mipexalazalekab.getenjoyment.net/fizawanidabadapotawabu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_6057b8b5ac9f3.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/rain_school_printable_text.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411273/normal_60593f7589f91.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/hp_printhead_missing_failed_or_incompatible.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444646/normal_602b01e844e6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469145/normal_5ff95743b89d9.pdfIn PDF document text
    • http://lasiwefomibew.sportsontheweb.net/the_famished_road_summary_and_analysis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_602e6c0e83bc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/verirejon/formatar_cd_rw_windows_7.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_7003db35b8744c0a81a60fdc9335d8dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wutogugej/rotunewevukezikuluram.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/cashback_movie_kickass.pdfIn PDF document text
    • https://0108a07e-94d6-443d-bfa7-575dd38852ad.filesusr.com/ugd/756a01_857bf497c2f346a48bb494a8921421e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/88861030967.pdfIn PDF document text
    • https://d64d5b41-a66a-4b78-b87f-0feaf8e9cf76.filesusr.com/ugd/cf1aed_58ddf106295e4d4686a34c99201c9081.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/nikon_coolpix_s9600_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/kitchen_design_brochure.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/cisco_virtual_esa_deployment_guide.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/ziviwaxo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00C 5556 bytes
SHA-256: 22fea2e942531dcf6cd0b9af21aeffec24724b788e44a858bd107d1dc6d4911e
font_01_sfnt_off000102dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DD 10496 bytes
SHA-256: 1f95d27683c9f6d715eccb83c8d90410612a8bf3c2c667e1747d266f5b393f70

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