Malicious PDF — malware analysis report

Static analysis result for SHA-256 58288b3a0c93a99a…

MALICIOUS

PDF

558.8 KB Created: 2020-11-16 21:32:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6ece2dbddcdf51767014fa345e37fdf6 SHA-1: 15ffff9507fbdf402ff151988d4f2108117f5134 SHA-256: 58288b3a0c93a99ac26564e6f2d2dfeab241340bf3a037a7947690960f328f36
170 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector link, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains elements suggestive of a download lure and urgency. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall context strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9248

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/123?utm_term=the+complete+contest+prep+guide+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5fa53aafb04fb.pdfIn PDF document text
    • https://jowomuzixife.weebly.com/uploads/1/3/4/6/134634296/mefelulipozug-suwozas-vasoneziwinibaz-jelujekujabegum.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/bunadadanoz_dupexubapide_padumavesofu.pdfIn PDF document text
    • https://mupipuko.weebly.com/uploads/1/3/4/3/134370635/9198398.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/a5ed03b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef46b5f6-37aa-4298-8aec-3e01424af41c/hohm_slice_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c70b3f8-23b4-4568-bac2-363b9449cf00/zoperokametolexeletofadal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451d65f9-2d99-4255-8763-88a2835b1a13/wanopedujajel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6afe61e8-3fcc-4f99-9d86-f34c4ec03183/tivomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be572899-d73a-46ba-bc8b-c18487cbe0bd/walk_behind_weed_eater_string.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c048d6-0906-4773-9f4c-a6ef799be6cc/berupaxijemubonuwap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f756173-bbaa-4fab-827b-eff3fce709cd/56660257876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4130fe88-2d69-430f-8001-1ce57d2be366/manual_roll_up_door_price.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_off00086a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A86 5612 bytes
SHA-256: 6ebc4f4d7b9458d14ccc45f42bb0af0cf09b66eeb2e85805d86edd05207a9bb1
font_01_sfnt_off00087d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D7E 14676 bytes
SHA-256: da6936be6ee84ab5ce3bd22dd5bb9b3d5a2e2b0bfe86915fb0ecb7d023cf7ba7

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