Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7ece596ae4f2f9…

MALICIOUS

PDF

79.4 KB Created: 2021-04-02 16:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 951bbd226742f0898a9381f63be85ce6 SHA-1: 2cc4ea6c09b42955032e9b0fa2e75e27f5b0c902 SHA-256: 8a7ece596ae4f2f98f59edf303d4a71052e150fe17b2e6e9784d7c5c5cec4558
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, and includes a URL that appears to be part of a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious 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://ponafet.ru/strik?utm_term=margaritaville+mixed+drink+maker+for+sale PDF link annotation
    • http://jawunefuda.mygamesonline.org/xefuxisetotetuvivolol.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/f7iijef/tik_tok_videos_telugu_download_free.pdfIn PDF document text
    • http://nubemeketetu.mypressonline.com/bsc_physics_notes_punjab_university.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/52996894127.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/gadanimopoxepebusi.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/haiDVDY/kowedizadidakidufudidi.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/gesgcii/download_wechat_stickers_for_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5c297679-0032-4319-a2a6-6965cad4a691.filesusr.com/ugd/b0b521_0c8c04e599b8473f811b59c923772ad4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8926fd9b-1017-47d6-9606-50cf72379cdb/5844486635.pdfIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_417ad10863704c5d8c47bd146e94cbbf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukajevo/47257404662.pdfIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_6c03a2ea8d5d4e9293b49ffe36121188.pdf?index=trueIn PDF document text
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_c5c6e833cf06420191d581a3db0da045.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/780c2e07-cc28-4434-b6a2-180ba62dc2a6/80349291665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4e3d1d-3b33-42f1-982d-f1d28dc0eca3/hoover_linx_cordless_stick_vacuum_cleaner_bh50010_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/lonetuwava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48151e84-da4c-4765-89b6-7d4b195c8dc5/the_knife_of_never_letting_go_chapter_19_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3d332e-aa30-4856-924d-83382b4604f4/troy_township_wood_county_ohio_zoning_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c99a6de0-ff47-498b-9da9-bc86088ab632/jibiripisirudan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9bcf247-3733-4d97-bff0-febcbc6c3694/fukomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac37c53-0463-4c21-9881-1f97e3cd1f93/11008326303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9fd181a-2ef2-4aeb-8154-595266757f48/fire_and_blood_game_of_thrones_episode.pdfIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_0ec0c53e07f34d49998ccede5bc7da8b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80A 5212 bytes
SHA-256: bd826d8a4ca8e35549568a624a6b4303b5584d8cd4479cf1ecd70b08365069f5
font_01_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 11288 bytes
SHA-256: 7b3f49f4fda083419b57920455801df223ffcb197cb9aada078f2a4443e5c5fa
font_02_sfnt_off00012011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12011 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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