Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30fcf610c77cee8…

MALICIOUS

PDF

83.2 KB Created: 2021-03-13 21:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 24d209cb400bf29410d008605b0f81b9 SHA-1: 7e0d27e2802f0836988baf1984354123f592843c SHA-256: f30fcf610c77cee83ac3596439b5d5a8335afcea56624d79c8d58931bfbdd06a
204 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam and phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'CLAMAV_DETECTION' flags it as 'Pdf.Phishing.Trojan'. The presence of a download button lure and password archive instructions further suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm suggest it's designed to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://botokaw.ru/wix?keyword=facebook+liker+apk+app+download PDF link annotation
    • https://cdn.sqhk.co/ripudilibizo/Wfajjdq/escape_grandma_s_combo_obby_panda_roblox_code.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/gd6jgNU/20221160787.pdfIn PDF document text
    • https://cdn.sqhk.co/xovatagemi/7NidZI2/67450201185.pdfIn PDF document text
    • http://golixudib.mypressonline.com/roxativitikufajejudova.pdfIn PDF document text
    • http://sosogemizibu.mypressonline.com/tikusufiniletedo.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/jj3ojct/auto_send_message_whatsapp_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/Sgchihi/dokodoza.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/logitech_k800_wireless_illuminated_keyboard_instructions.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/figilasifujirupow.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/wizuluworafid/gantz_perfect_answer_2011.pdfIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_f6e6b6ea505d4ab28e38547a10f7c86b.pdf?index=trueIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_297a6532209f418090bbd3458bf4de6f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liguwubore/mufakatawuxiru.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/36978827553.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/muliju.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/78323788204.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/boxufetetude.pdfIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_216505680e3f45ebaaac5759c1bbc836.pdf?index=trueIn PDF document text
    • https://01ff271a-2d66-4e22-ac0f-a796646d2f56.filesusr.com/ugd/8d93e9_de09625865584517b4ed1dec213a99c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paropabaru/what_chapter_is_firmament_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/free_printable_gratitude_journal_template.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/kangana_punjabi_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/90117085925.pdfIn PDF document text
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_55d05011cffb4c39b6bcbd2a5c9e1a18.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapota/alien_shooter_4_game_free_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/bamimurupenewelu.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/32709602494.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012505.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12505 16888 bytes
SHA-256: 52c9adcca337f49898927ccc1d058a0d959a80d690cbc3b991a60681df79fa66
font_00_sfnt_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 5140 bytes
SHA-256: 9d3286dc83092783e94979f5cbbc1c6515462795146286b0edbe7f365d121dff
font_01_sfnt_off0000fdc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC0 11788 bytes
SHA-256: 91af6db97e21795d60e3f42e84309184f483561d52a6ccfd0573c7040dba5469

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