Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa63960cc89328c1…

MALICIOUS

PDF

93.1 KB Created: 2021-03-13 15:49:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0c2240f55e5c2e69862f268c90983482 SHA-1: 8f8fc5c7064bae17751bdb8d1802dc0601b84a7f SHA-256: fa63960cc89328c1557e722c6369a1c2f13430d4953c2c074d36da0bb23a72c2
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=janatha+garage+movie+songs++telugu+wap.+net PDF link annotation
    • https://cdn.sqhk.co/gabisolovima/7hhLHgc/kunujagipukib.pdfIn PDF document text
    • https://cdn.sqhk.co/jidevumedure/gf8O4gj/sweet_love_letter_for_her_birthday.pdfIn PDF document text
    • https://fubudebuz.weebly.com/uploads/1/3/2/7/132712336/gajarubibufe_dupewezo.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/Tyggicc/find_friends_app_iphone_ios_13.pdfIn PDF document text
    • https://duzuvopewawufos.weebly.com/uploads/1/3/4/4/134491429/naxodiduxax.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/4348017.pdfIn PDF document text
    • https://cdn.sqhk.co/kifateten/Yjjhi8Q/23775255428.pdfIn PDF document text
    • https://bofakodejo.weebly.com/uploads/1/3/4/2/134265658/df02f3.pdfIn PDF document text
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/waloneg.pdfIn PDF document text
    • http://zaxukifo.22web.org/romeo_y_julieta_1875_bully_reddit.pdfIn PDF document text
    • https://cdn.sqhk.co/xojurolaruk/HbYihjh/tobadaa_activity_tickets_private_tours_watsonville.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/tb0gjw8/fast_driver_3d_level_64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fizenigapajawak.epizy.com/76082923949.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_02f32f3d45d240b49da96a47f819eed1.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_b4b71a6c48bb476095b7db2eba7228b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/contingent_liabilities_are_disclosed_in_financial_reports.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_4f8069fd5c13438b9a7b29faecc9c09b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/pepijip.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/40472208501.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/kuberifafuvurugisavu.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_off000115d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D8 5404 bytes
SHA-256: 1a7a9bff455059eda6d317769f6437c7c5c9be8d2893ec96960dfd3dd3a7d884
font_01_sfnt_off0001282c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282C 11352 bytes
SHA-256: 8f2e90bb4d7bcb727c0d7c00e0fe1ca31705bb62fbd246c0fbec4654cea7a090
font_02_sfnt_off00014f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F28 16320 bytes
SHA-256: 788879f63d19eb60782e8118c7ee8b126131e224a4287905a5efa069f13d8305