Malicious PDF — malware analysis report

Static analysis result for SHA-256 844adea0cdfd440a…

MALICIOUS

PDF

86.6 KB Created: 2021-03-16 08:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fbf0ac11a882d992d1a58b1b188af277 SHA-1: 6ddd00a210c2aaa364d44cb9fe0ea0bc50ebfc31 SHA-256: 844adea0cdfd440a4dcf29e98e8517e7b0c1d11a6528e5bbb37a0d6a0c5eb3b8
186 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The embedded URL 'https://midufefew.ru/wix?keyword=spy+mouse+apk+download+ios' indicates a lure to download potentially malicious software. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://midufefew.ru/wix?keyword=spy+mouse+apk+download+ios PDF link annotation
    • https://pudoxarunisit.weebly.com/uploads/1/3/1/1/131164251/jewenuduv.pdfIn PDF document text
    • https://gujetorepirun.weebly.com/uploads/1/3/4/5/134502828/6945964.pdfIn PDF document text
    • https://jabiwogox.weebly.com/uploads/1/3/1/4/131453485/latoril.pdfIn PDF document text
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/punifo.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/1447822.pdfIn PDF document text
    • https://nogalagamepet.weebly.com/uploads/1/3/0/7/130738620/wuwewutavejetijala.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/venabiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/reduce_size_acrobat_standard_dc.pdfIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_fe2620a7aeac4588baeb584583e59a8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8edd6b47-d39a-43f2-b2f8-6af8e0372c51/unearthed_arcana_magic_items_of_eberron.pdfIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_d0e7a6f666b4474b96a6ee7ce3ee1308.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/963b9efd-b95e-4b8b-9eb4-5c1d8142b5cd/what_is_better_shark_navigator_or_shark_rotator.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_4b0510de46a046a7ba8782f0d9cd40b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/what_is_a_calliope_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/69818331856.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/axe_fx_2_patches_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/6533572249.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/94956749720.pdfIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_b549ced26540486a95dceff67f53f251.pdf?index=trueIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_0ce82a433abb45c5931d15c1512f577e.pdf?index=trueIn PDF document text
    • http://zijedan.atwebpages.com/economics_lesson_plan_high_school.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
    • 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_off0000edc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 5368 bytes
SHA-256: e795e464032c7bf38aa69cbba10e630a4400a9cd16db6558dc8d1cc5adfae325
font_01_sfnt_off0001000f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000F 23428 bytes
SHA-256: 7e663092e76664873e89143844de1328100a21b557dc2c9552123730492a3834
font_02_sfnt_off00013623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13623 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848