Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebe416edd2c85b7…

MALICIOUS

PDF

73.8 KB Created: 2021-06-08 10:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f4aef79532cde2697319d6736278dbaf SHA-1: 5401848339270d94e5fb85490df5f374bee52dfc SHA-256: aebe416edd2c85b7162007472cc3d73ae9fb8232b09dcf15f83eee9aa95ceae3
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 hosting, suggesting a link farm or SEO abuse tactic. The embedded URL 'https://archism.ru/pbw?utm_term=can+i+print+a+direct+deposit+form+from+wells+fargo' indicates a lure related to financial forms. ClamAV and ML classifiers identified this as a phishing or malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://archism.ru/pbw?utm_term=can+i+print+a+direct+deposit+form+from+wells+fargo PDF link annotation
    • https://zotolujirerezo.weebly.com/uploads/1/3/4/5/134582396/8753757.pdfIn PDF document text
    • https://gedenotovet.weebly.com/uploads/1/3/1/3/131379555/8676954.pdfIn PDF document text
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/pulizuvupunuja.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/82a15978-e98f-4405-a09e-6be345e5cac6/44837003928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99f36d17-37fa-4d6c-aeb6-38f2449db9ff/20759747374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a79c4957-a349-479d-97b8-e903d69a5c0b/5463399563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8316db2f-75ac-47bb-a526-f7ce25569a82/is_hyundai_tucson_expensive_to_maintain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4409c8-4ab6-45d7-b2fc-b0ef5bbae9e3/sazefakaruninene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b0cc5d-fb34-4ac6-9edc-986a9be7f301/68487394186.pdfIn PDF document text
    • http://muzurinugaw.pbworks.com/w/file/fetch/144839982/paranormal_activity_ghost_dimension_house_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2ffc77-df9c-4768-91db-17f41ab9ba44/melabudefapolabisamunix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7fe1a2a-e39b-4fdb-a505-716505203e80/nozazoweveles.pdfIn PDF document text
    • http://xugilip.pbworks.com/w/file/fetch/144629130/zannier_hotels_namibia_sonop.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/14754045554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea979972-7a38-4c0c-a113-d75eeebcae46/sony_ht-xt1_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/799044bc-3488-4eb5-a160-1bd38ff3d78d/how_to_replace_belt_on_whirlpool_duet_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24f2997-413f-4dab-9906-3f4b456206d8/why_does_my_verizon_jetpack_say_no_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4682d8-f2a3-4b45-937b-c9ea07e4b249/nexogebef.pdfIn PDF document text
    • http://nubuzefi.pbworks.com/f/soap2day_vip_free_movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9731abdd-f037-4f05-a428-a3fce549921e/the_communist_manifesto_chapter_1_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229b9ee1-6100-48e8-a0db-811ffed8e284/what_is_review_of_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5509f414-8efa-4cb8-b1b7-ec32f166a4a1/2006_yfz_450_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3fa405-9b08-40ba-b74e-b4757e3f6983/20429068362.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B9 5472 bytes
SHA-256: 46daa4ba2f8856bbf18b1b4d2870702af62b22faa8165f46bf75853e4838f5bd
font_01_sfnt_off0000f451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF451 10664 bytes
SHA-256: 9a56f6e9430da1e3159837bfe8b5ecebaa147d94ec01018420cccce4e24e8dac