Malicious PDF — malware analysis report

Static analysis result for SHA-256 499fe308081ef111…

MALICIOUS

PDF

69.8 KB Created: 2021-04-04 17:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7b4bec59821a537b5e27c28df653a950 SHA-1: 697a378310c65f0baa5be73841dc94b42e90ce0c SHA-256: 499fe308081ef1112cb3912dfc8e66d91d359f55cc65709b85b0b8c9d6c45eae
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO spam operation. ClamAV detected it as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/award?keyword=breckenridge+ski+resort+map+pdf PDF link annotation
    • http://1fps.ru/50757310526kmi1n.pdfIn PDF document text
    • http://o-karte-kopilka.com/gekanawibepudfqfo.pdfIn PDF document text
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/e845118d.pdfIn PDF document text
    • https://mejoraxu.weebly.com/uploads/1/3/1/3/131380998/dec45.pdfIn PDF document text
    • https://baraxuworasexe.weebly.com/uploads/1/3/4/6/134633060/teladogi.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/muvikafotejifisu.pdfIn PDF document text
    • http://laxana.ru/the_wanderer_above_the_sea_of_fog_descriptionl8n9i.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/sewozatazu_jorabuweb_dexadibewevow.pdfIn PDF document text
    • https://teguzefememefa.weebly.com/uploads/1/3/4/6/134609716/bakaxuzol-xufam-jorobugame.pdfIn PDF document text
    • http://chelamela.org/dish_vip722k_remote_codeskknv1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_60424331ed05d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485299/normal_5fff7465a030e.pdfIn PDF document text
    • http://card2card.live/jiritigutevok6whju.pdfIn PDF document text
    • https://zexonozanefamiw.weebly.com/uploads/1/3/1/1/131163740/0944f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453575/normal_5ff71842535f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00340be6-f562-4542-914c-1f7c361b5151/who_gives_the_best_home_equity_loans.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_0a336d78686a40d3aa4e8637ec6e6635.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05377305-865c-4e91-93a5-32ad8ecf2602/why_did_my_garage_door_remote_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df53c16b-d59b-4483-ba82-860b4c037323/86723037961.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa1ad96-e952-434b-b80d-e5e17ccaf863/sole_e25_elliptical_size.pdfIn PDF document text
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_32102b46254f471e8b6cc5521e112936.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba866c2-1978-4798-9b74-d8aa75435837/55805423768.pdfIn PDF document text
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_25b5d33bde18476494ecd3d6720e8f36.pdf?index=trueIn PDF document text
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_14113fe8c72242bfb3c710a27d6f2a2a.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26F 5556 bytes
SHA-256: 7e20fc938bfdd921ccbcd8e418e391a8cf4749c556df6334fc6b4b512c0a2ef3
font_01_sfnt_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 10132 bytes
SHA-256: 32e40e5c6b729e14a5abe4fdefb2505c61736260da2afdc13067d21ab7b43590