Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15593c0b208521a…

MALICIOUS

PDF

78.1 KB Created: 2021-04-03 21:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b50558f45c998551773cfc1672f7d226 SHA-1: a9459a65d34ac004fc4413a2b579ca8d7a266340 SHA-256: f15593c0b208521aa5d3de9068bccea3503abe1b74142a81ba4ce86d721144d5
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 domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or leading users to malicious sites. The presence of embedded URLs and the structure of the PDF, which includes a link farm, support the classification as a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://seumenha.ru/wix?keyword=forensics+unit+2+study+guide PDF link annotation
    • https://fapuwokezisojo.weebly.com/uploads/1/3/1/4/131453853/529e959dfff4b76.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/how_to_factory_reset_samsung_a6_tablet_without_password.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/hadji_murad_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/gixixutiji/gwFGlig/72896558196.pdfIn PDF document text
    • http://all-system7.club/xazozunewizeneko09ni2.pdfIn PDF document text
    • http://parovosi.mygamesonline.org/vanipanusetokividu.pdfIn PDF document text
    • http://dosefokinuvulo.mypressonline.com/can_t_hurt_me_david_goggins_drive.pdfIn PDF document text
    • http://hookup673.site/ejemplos_de_velocidad_instantnea_oxn67j.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/jhM7G3r/99412087731.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/dd3f06583.pdfIn PDF document text
    • https://ganunuzarije.weebly.com/uploads/1/3/4/5/134518475/wiporebar.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/51796107496.pdfIn PDF document text
    • http://russianstravel.ru/seserotenuvtqb.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/jJRVjss/garden_answers_plant_identifier_apk.pdfIn PDF document text
    • https://faniruwesil.weebly.com/uploads/1/3/5/9/135993686/metipepu_vetarane_jusorilezeje_xufupuxoxulotef.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • https://naruvemekojesez.weebly.com/uploads/1/3/4/6/134685524/wevivogajudot.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/e17ad5aa-8095-4845-9771-defd44a1d59c/lonopejonabaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9818dc2a-0767-4bb1-b931-764b67d4eebb/how_to_contact_starbucks_rewards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b18ee77-f6b4-4398-a47b-1bd40a83c2c1/piwomunupegozejejevijin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0870cb21-d823-44f1-9e63-9f95840f0e1a/nesawa.pdfIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_ca487981b2264147b944f86b3a9ca0d1.pdf?index=trueIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_3bb34ceed5a84e4581655f8377a039a5.pdf?index=trueIn PDF document text
    • https://8a05da06-75fd-4b4b-8779-f7668a2fa4a0.filesusr.com/ugd/da32d9_1846571e333d499abf36099922468db0.pdf?index=trueIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_6fa8eb80f6584493bed8d8a83242e74b.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_ab863d84a5d6485ba4c2368b22e90755.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_off0000f418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 5052 bytes
SHA-256: 7f8b7f55abb5f843a4b705a91f680719b0bfdce63945efe7bdac70c2343528ac
font_01_sfnt_off00010568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10568 10904 bytes
SHA-256: e44819e16b97392a9593d4aee42ded7b0454cf7e8a21a6beff56de4c8e11345a