Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e618a77880684b…

MALICIOUS

PDF

81.5 KB Created: 2021-03-15 13:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2366c268f666a5166b1dbcb09d2aaaf5 SHA-1: 74fc1ff8246b2cf2da47ef3fa61531f0e4c0dee7 SHA-256: 52e618a77880684b3787c1d09239b7a0e9e9b061b751fdf538c8ef1e37a49c12
156 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including a high ML classifier score and ClamAV detection as a phishing trojan. It contains numerous external links, with one pointing to a suspicious domain 'jumiwimov.ru', likely intended to redirect users to malicious content. The presence of many PDF links suggests a link farm or SEO manipulation tactic to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/wix?keyword=series+circuits+physics+classroom+answers
    • https://cdn.sqhk.co/zoxunoromi/wrheihq/73175878044.pdf
    • https://ragaxunuwad.weebly.com/uploads/1/3/1/4/131407405/vewewukoneditituko.pdf
    • https://cdn.sqhk.co/suxejatove/iew5gh1/46552597661.pdf
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/tamedegaxifawap.pdf
    • https://sipadaguw.weebly.com/uploads/1/3/4/3/134322090/ad291267e10d096.pdf
    • https://cdn.sqhk.co/raserijene/icgjnG7/best_audio_music_player_for_windows_7.pdf
    • https://cdn.sqhk.co/mezigiduze/Xjbhhjh/61227733898.pdf
    • https://pikotawikeju.weebly.com/uploads/1/3/4/4/134496208/80170f5c.pdf
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/9248275.pdf
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/46cd948229e2852.pdf
    • https://cdn.sqhk.co/fexilejedit/bfv1Zjc/world_cup_1986_final_full_match.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0032946d-64dd-41d5-ad22-7a4fa02d62bc/hush_hush_becca_fitzpatrick_movie.pdf
    • https://ad060920-74d0-4a59-a46a-f478898ed72a.filesusr.com/ugd/a7c1e6_d248b1d8d9e04cdeb5390d41b8b1974f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8add58e9-a8cf-4888-bb19-e6ce746878fd/49003732655.pdf
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_10303c779fe24fd683960ea1e36ca32a.pdf?index=true
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_2f38dc32dcc446b28efdf54022e888c7.pdf?index=true
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_837a32705e72411caf64f7fc29a2d6da.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f7f008b8-bb8a-48b3-a8d6-32a9e07d0395/tom_sawyer_detective_book_covers.pdf
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_acc313d62fc54237942e9ac5e5f67dcf.pdf?index=true
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_dd648eda59a44487ba6384b29c282f83.pdf?index=true
    • 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_off00010121.bin
1daccf10ac4f6b2a1a792ffbb8d260c8e724306558657b21783c0697f40406bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10121 5472 bytes
font_01_sfnt_off000113a9.bin
237b945343a29b860c6c13702ee79e8e572ad7dedeede6cc923e22920d8caf8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113A9 10900 bytes

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