Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abf76da4cae260e…

MALICIOUS

PDF

80.2 KB Created: 2021-04-01 18:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8b7bb91348220b0a202768b6189e7225 SHA-1: 460de9051c2225288da3930821ab4e5b70ea662d SHA-256: 4abf76da4cae260ed61d2322389c5d2ecf5747fa99da9546f03b8e4e4f2a36f9
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URL `https://soxebez.ru/wix?keyword=spotify+latest+mod+apk+reddit` indicates a potential lure for users searching for software modifications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/wix?keyword=spotify+latest+mod+apk+reddit PDF link annotation
    • https://cdn.sqhk.co/woguwubege/xHggJij/65383204465.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/video_games_advantages_and_disadvantages.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/1323427.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/oIjalSm/atif_aslam_old_songs_unplugged_download_mp3.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/change_to_word_document_for_free.pdfIn PDF document text
    • https://tewabigonin.weebly.com/uploads/1/3/4/7/134760563/9095272.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/mesux_kubazujoxuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_603c7439de1f6.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/bNCqz0B/room_escape_contest_2_level_21_losung.pdfIn PDF document text
    • https://wopadutizibum.weebly.com/uploads/1/3/4/3/134306931/bunatetiver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_6030d98ded63c.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/apdiiih/aerial_duels_meaning_in_football.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/jigjKd8/wozitedetezisovomaz.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/sinusite_alergica.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadumiza/eh06hav/33444225527.pdfIn PDF document text
    • https://cdn.sqhk.co/lowixadoges/lNZnick/facts_private_school_financial_aid.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/S4Kjegh/7384767993.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464527/normal_5ff4a75341363.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1437f3f1-f978-4e1b-9120-555090070881.filesusr.com/ugd/d4ef56_1eb110669e3240fea1c82a4c1d1bf163.pdf?index=trueIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_116372ed64ab4a95a0cd9c9930a2b1d5.pdf?index=trueIn PDF document text
    • https://170d08c7-2527-4f8e-8bc4-cf7f6ffab704.filesusr.com/ugd/afe24e_580e484822544390b3ce7bce5ef910cd.pdf?index=trueIn PDF document text
    • http://nakixaxev.myartsonline.com/1990554545.pdfIn PDF document text
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_dbbbadc519544f608618b21c67ce1c30.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A1 5456 bytes
SHA-256: 949277fb02233bc99701ea522ae254c9a1c0612032e3813297901598ee8fd87d
font_01_sfnt_off0000f527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 10324 bytes
SHA-256: 5a814048b1c16ee4edf9b9bae67de7d5ae2a8e6e8d960ef8854e10c344eeccdf
font_02_sfnt_off000118c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C4 17672 bytes
SHA-256: f9d15a632ebd35e3fa6816c535845e351ccb915e4e9b2b05a98cdbe137ae7047

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