Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bd9d4a8e3f2acd…

MALICIOUS

PDF

75.4 KB Created: 2021-03-31 11:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d8eba647bf5e3a7a5ef2c6fdb8b91e5 SHA-1: b561189088067fd156e1870d82e28f8c5edd61e5 SHA-256: 06bd9d4a8e3f2acdb9cee47c3ed108b5338c0a90cf55a7ee97215865f746c153
164 Risk Score

Malware Insights

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

The PDF contains a URI pointing to 'ponafet.ru' which is suspicious, and a heuristic indicates a link farm with numerous external PDF links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to the suspicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://ponafet.ru/wix?keyword=adult+swim+dragon+ball+z+kai
    • http://kedugobepuged.mywebcommunity.org/tratamiento_actual_de_artritis_reumatoide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rizezobabub/2810792765.pdf
    • https://uploads.strikinglycdn.com/files/24ce36ee-9f93-4f49-8c16-13b100513d9c/how_to_tie_leather_knots_for_jewelry.pdf
    • http://raxagis.rf.gd/aadhar_application_form_download.pdf
    • https://s3.amazonaws.com/zunaduxa/33647614149.pdf
    • https://s3.amazonaws.com/wusone/15756296977.pdf
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_5569a5b6a3d34f6b9cace78cf20f69cd.pdf?index=true
    • http://zusaxadixuxot.myartsonline.com/99957185852.pdf
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_21b19190a4444d919d815311b4f29e6c.pdf?index=true
    • https://s3.amazonaws.com/vapelurowar/93969957414.pdf
    • https://uploads.strikinglycdn.com/files/1b4cd916-82b8-4c70-ad9b-9fce2d18b66e/93015054048.pdf
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_2bd6dca449494faea685d0872e17a649.pdf?index=true
    • http://nibewisule.epizy.com/pasatevefolosan.pdf
    • https://uploads.strikinglycdn.com/files/97220521-f983-47f6-9339-8ea57b446817/what_is_yes_in_egyptian_arabic.pdf
    • http://tizovosavudufi.rf.gd/sansa_clip_jam_rockbox.pdf
    • http://fovawipemezipu.myartsonline.com/gumowotu.pdf
    • http://bejiteviv.epizy.com/gamolokejapewiziralavaju.pdf
    • http://widepidaba.atwebpages.com/prioritized_experience_replay.pdf
    • http://soranodabiwegi.myartsonline.com/xodabesib.pdf
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_4b34591ee3614a029e3b59f105985bfd.pdf?index=true
    • http://zokaramizixa.atwebpages.com/mapotavifip.pdf
    • http://viniwowosur.onlinewebshop.net/debate_topics_for_high_school_students.pdf
    • http://visunes.myartsonline.com/ielts_general_writing_task_2_topics_with_answers_2020.pdf
    • https://s3.amazonaws.com/dojonuta/letter_l_worksheets.pdf
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_99b7246821d74cf69014b521efdcf3ab.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_off0000e8fb.bin
abc96371e6fdb1dc8d408ea8e3126a0294281cd8f151b1e184ba696e710aba65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FB 5480 bytes
font_01_sfnt_off0000fb9e.bin
8c48277774605136dd94205c33b5b11fe26ebf91c641d66097fdd5564f12fafe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9E 10684 bytes

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