Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa49e5a647f2b18…

MALICIOUS

PDF

74.7 KB Created: 2021-03-17 05:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 882be69a3900c7411f8062f4370bead2 SHA-1: ed568c76587f683735a0e0105f8ad36238aa0f41 SHA-256: 2fa49e5a647f2b180eb9ef795b945aa033d5879aee6baf94c9640a9b2175438c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and one suspicious URL (https://soxebez.ru/123?utm_term=spongebob+chum+bucket+meme+template) which is likely part of a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=spongebob+chum+bucket+meme+template
    • http://zomoxoxuriw.mypressonline.com/attachment_style_questionnaire_for_adolescent.pdf
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/sikoneb.pdf
    • http://lelekelosutov.getenjoyment.net/kovofiwikozegogokozuwa.pdf
    • https://munipepuxorikoz.weebly.com/uploads/1/3/0/9/130969311/kijusabuzuza.pdf
    • http://zamuxodub.22web.org/alveoli_are_formed_from_what_tissue.pdf
    • http://zanomafu.22web.org/cute_muslim_babies_images.pdf
    • http://jonotijero.medianewsonline.com/78968969445.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_d8a6153e16f24222895043b424f55154.pdf?index=true
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_8df794e590aa4909a825e7e4c72ba868.pdf?index=true
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_b70af8ab89ce47cdb1c8324cee2fb5ba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2c3ff664-8e3c-4bee-af15-05d3d0e66741/how_to_read_thoth_tarot.pdf
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_86d2072c575447d9a355fa60c3a09342.pdf?index=true
    • http://jaxunukologefis.onlinewebshop.net/nexik.pdf
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_12e042f90e574ec4a522e754e3f47238.pdf?index=true
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_558a3319e5ab4ba5b6227830e1c731c7.pdf?index=true
    • http://bivoxubi.epizy.com/rockstar_movie_free_for_mobile.pdf
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_efc5fe9ebedf4cbdb174dc9a03c8c0a2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b55134ab-b043-48b9-bd66-8646745755fe/jadoje.pdf
    • http://wafubarig.epizy.com/7762013108.pdf
    • https://uploads.strikinglycdn.com/files/769c1671-e6d7-4238-b248-8be3a77477fe/kali_linux_download_for_windows_10_64_bit_virtualbox.pdf
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_c6fb4a4361ca43ab88e3399be870a9b0.pdf?index=true
    • http://gadoxijumulop.epizy.com/kanivekuvukivu.pdf
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_fa22c29bb4b141eebe8f56ae03816b62.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_off0000e49f.bin
be4ff8bb89888ab27196daa8d77b9a8ad9f0112230766de456a2be5d4244e3ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE49F 5380 bytes
font_01_sfnt_off0000f6c8.bin
93416708bdb0d749484e8b16914d5b0bf3dae765bb58deb8847761cd0e3e8ed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 11276 bytes

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