Malicious PDF — malware analysis report

Static analysis result for SHA-256 3202fbfe73df52bc…

MALICIOUS

PDF

72.9 KB Created: 2021-06-05 16:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccdba53fd7cd936c984cb58d1721b5e4 SHA-1: e27950741a7bed33b527b0f0e57175c6ab3e2848 SHA-256: 3202fbfe73df52bcd96f365c3ad45447e4c93bc12532cb35bf092d4a5e73f38e
96 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, identified as a PDF link farm, suggesting an attempt to drive traffic to external websites. The primary URL, 'https://nomylo.ru/pbw?utm_term=uyirai+tholaithen+athe+unnil+thano+tamil+mp3+song+download', appears to be part of a SEO spam campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://nomylo.ru/pbw?utm_term=uyirai+tholaithen+athe+unnil+thano+tamil+mp3+song+download
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/f07ce7d2a0e43.pdf
    • https://cdn-cms.f-static.net/uploads/4482872/normal_60516767e7e69.pdf
    • https://static.s123-cdn-static-d.com/uploads/4446398/normal_60b5201a6c5d6.pdf
    • https://zunaxezosepoto.weebly.com/uploads/1/3/0/7/130739564/movixikavidudaj.pdf
    • https://meverelalopabij.weebly.com/uploads/1/3/4/1/134108836/xufan.pdf
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fda8be3ae00e.pdf
    • https://static.s123-cdn-static.com/uploads/4367919/normal_5ff4ae6388574.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/95a1fbb6-3867-4399-9363-c0ed8d81d1e7/intlo_deyyam_nakem_bhayam_watch_movie_online_dailymotion.pdf
    • https://uploads.strikinglycdn.com/files/64649793-146c-4f29-8388-52b62fbb6f6d/fisinomuvusefa.pdf
    • https://uploads.strikinglycdn.com/files/1a6ea32c-600d-42cf-8945-7bbbf8f0352c/pigofepotinava.pdf
    • https://uploads.strikinglycdn.com/files/0251892b-0a2b-4dce-aa1d-17e67486592b/kivemegawinamekovavox.pdf
    • https://uploads.strikinglycdn.com/files/0347ed39-43de-4a66-897c-1ee54e7be7de/ink_cartridges_for_epson_workforce_wf-2630wf.pdf
    • https://uploads.strikinglycdn.com/files/49caa11c-5e06-4070-9071-dc6ad52b6d4f/international_journal_of_medicine_impact_factor.pdf
    • https://uploads.strikinglycdn.com/files/13222230-84b6-488b-95d3-2836103c09e2/fate_rpg_game.pdf
    • https://uploads.strikinglycdn.com/files/f877e791-ca54-4bd1-b6ec-cbd977efb45c/75740047722.pdf
    • https://uploads.strikinglycdn.com/files/9871fb0f-03ab-42d9-9c45-ed38f8a8e752/80849008461.pdf
    • https://uploads.strikinglycdn.com/files/b38332d0-e397-4a0c-b974-02b39e1f8859/58520186495.pdf
    • https://uploads.strikinglycdn.com/files/d9af0b91-5759-4ada-818a-c51f48f3ee3f/easy_movie_maker_software_for_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/ac58f925-63d1-4645-9c37-321af14bdfb1/72443083116.pdf
    • https://uploads.strikinglycdn.com/files/4763fa02-b5d1-4ddf-a370-7c4f5bfe0b1d/can_diabetics_donate_blood_american_red_cross.pdf
    • https://uploads.strikinglycdn.com/files/cce8304b-160f-4a72-a996-d6ad17f2f08b/83119081154.pdf
    • https://uploads.strikinglycdn.com/files/d78526e7-7592-43ba-a130-38694c959401/44695983230.pdf
    • 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_off0000df0e.bin
6f0097577ba69f6828ed1ae0ea6565ad04c416d97d593cf295154bb814d2379c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0E 5724 bytes
font_01_sfnt_off0000f279.bin
48e69521d0c2daab99eabedfe29d2934c2d681a3882385fedaaa4834fbef8fa0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF279 10412 bytes