Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e84245f36229e90…

MALICIOUS

PDF

77.7 KB Created: 2021-04-28 01:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 010f53dc5a50830d90aa5c0d53cc15d9 SHA-1: f3af1884264739b01901ee0651f4c56192d73835 SHA-256: 7e84245f36229e90e911058b0f4a0c4bb0b8684979665614b780e7c6dcdb4229
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to external PDFs, masquerading as driver downloads. The primary URL, https://xezojetit.ru/strik?utm_term=dell+latitude+e6410+bluetooth+drivers+download, suggests a lure for users searching for specific hardware drivers. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM indicate a large number of external links hosted on disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=dell+latitude+e6410+bluetooth+drivers+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465707/normal_600992d956f16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_601bbd8b16f84.pdfIn PDF document text
    • https://cdn.sqhk.co/gobavata/gcBdiib/sakura_school_girl_simulator_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407327/normal_6009369d643fa.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/MihjGaj/27410273853.pdfIn PDF document text
    • http://wemigime.iblogger.org/64053626710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459185/normal_604367b5390ae.pdfIn PDF document text
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/3709578.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/6d7c36d44314c92.pdfIn PDF document text
    • https://tapegijenokog.weebly.com/uploads/1/3/4/3/134376615/022271.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/db4eee31-2470-4a71-8f6e-4dec7e4a1be5/58981146784.pdfIn PDF document text
    • https://a3abd3d7-f7e4-4b0c-86b7-ec358d8c805a.filesusr.com/ugd/97a3b3_7aec5dedcfba415da7fecff88e532897.pdf?index=trueIn PDF document text
    • https://77a5c3e7-429a-4f60-ad30-886abaef4f6e.filesusr.com/ugd/07a1ab_e960db71536a46e6bc4fb7370a93c13f.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_6097760fa3a44e599cf131d95181efc9.pdf?index=trueIn PDF document text
    • http://fipabadidori.epizy.com/university_of_nottingham_quality_manual_extenuating_circumstances.pdfIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_0bafe1ac69404f01874bf85901d9e25e.pdf?index=trueIn PDF document text
    • http://xonoxizefonodas.epizy.com/32070618978.pdfIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_27d5251818fa4ea5a6b377905150e413.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0545af-6382-4f55-a457-39c34a5bded2/the_little_prince_2015_full_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2158320-9a12-4506-ab3d-73e945b5f32f/how_to_bet_blackjack_basic_strategy.pdfIn PDF document text
    • http://zetesapoxus.epizy.com/85410590404.pdfIn PDF document text
    • http://turojupa.epizy.com/62285814167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aedbba9-b3bc-42d7-a9c5-8aa8e219eafd/finitemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43ef0fb7-97f0-4fea-ba4f-105d3ca25790/chamberlain_liftmaster_professional_garage_door_opener_remote.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_off0000ee33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE33 5640 bytes
SHA-256: 1717d6c405b08290211457a8783d3bb9095ce545471a305202d24c2387af3648
font_01_sfnt_off0001017c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017C 11164 bytes
SHA-256: 225b19c24cf60c54698ba69f50020076e96e1812ae8f0129f7e068c7d7ee6ffe