Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a427cafdb3773bd…

MALICIOUS

PDF

83.9 KB Created: 2021-05-26 05:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b508d35b50eae57da7f0f482edd2d1c4 SHA-1: 6eb1b0a01ccffc7c669bd13c34abb8983bc32ee0 SHA-256: 0a427cafdb3773bd5b1e16187bd24221cc3d79926174b3c0ac2f2a9ddf57705d
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm or phishing operation. The presence of a 'download button' heuristic further suggests a malicious intent to trick the user into navigating to a potentially harmful resource. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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
  • 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://dugedepap.ru/strik?utm_term=what+is+article+370+and+35a+in+urdu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369318/normal_6013b37bb8875.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/ratabofijobupukorem.pdfIn PDF document text
    • https://bijafifevidajun.weebly.com/uploads/1/3/6/0/136051066/9144591.pdfIn PDF document text
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/puvuxulafop.pdfIn PDF document text
    • https://burekanokem.weebly.com/uploads/1/3/1/0/131069897/ed9650.pdfIn PDF document text
    • https://gomimujetaveve.weebly.com/uploads/1/3/1/4/131406784/1958032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5fd0d59eaec81.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/farefasejikap/22524995021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb1016a5-043f-4820-a4ef-232b4229c943/armstrong_furnace_parts_dealer_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/313403b5-37bb-4f5b-b6fe-488a1af01e11/79781178839.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/where_is_the_battery_in_a_welding_helmet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd7f16c-6a52-4ee2-8f3f-a73ffc6c3e07/fasopub.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/game_asphalt_7_mod_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/12098728631.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/xolediguri.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/how_much_oil_does_a_honda_fourtrax_350_take.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/38745832976.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/mefawov.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/dezis.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/adapting_to_the_environment_haspi_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001760ce-b4e0-45de-9ec8-d15351ef61c6/kazewipiturekemid.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/42100516546.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_off00010978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10978 5548 bytes
SHA-256: 87255c35993b8601ffe3746ffe4cd39626bd8493886dd836930b6717ed099943
font_01_sfnt_off00011c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C62 11020 bytes
SHA-256: 024e58777ed69a2a632bb0da1800f98fd7414c858b5fed95195206cdb2be2669

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