Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34f8f7f0db64f36…

MALICIOUS

PDF

97.7 KB Created: 2021-04-30 10:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 654a15882d9c69a292ce869ef04d6f94 SHA-1: f331f6279cc1980c565643a1a03568694d21957e SHA-256: c34f8f7f0db64f36bbc2c618176f8cb883aca1f94742876644b7f4c62d2c447e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting services and utilize UTM parameters, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=dazed+and+confused+script PDF link annotation
    • https://jazitilifa.weebly.com/uploads/1/3/1/4/131414561/lanakigazad.pdfIn PDF document text
    • https://famuvotatag.weebly.com/uploads/1/3/0/8/130813835/kefozewevawowivixev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_603bc0972bc92.pdfIn PDF document text
    • http://gratoramaa.website/275411403877dcpi.pdfIn PDF document text
    • http://ogranicbio.fun/french_revolution_movie_questions_answers47ixl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407996/normal_5fc8767b0c9eb.pdfIn PDF document text
    • https://gamabisage.weebly.com/uploads/1/3/2/6/132681080/5640867.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378160/normal_5ff86e96e1666.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/ggJwagc/packers_preseason_schedule_channel.pdfIn PDF document text
    • https://cdn.sqhk.co/nenuguvan/1gjjhjs/best_english_romantic_song_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lebuzalezu/3jeiagd/vintage_collectible_costume_jewelry_marks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_6034f277427e5.pdfIn PDF document text
    • https://cdn.sqhk.co/migixurej/gjogg6C/school_days_game_download_uptodown.pdfIn PDF document text
    • https://jojijuwewit.weebly.com/uploads/1/3/6/0/136057333/sijonupogag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_602408e67a2d2.pdfIn PDF document text
    • https://zirofapenepag.weebly.com/uploads/1/3/4/8/134855920/9098514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_605d96df8c5ba.pdfIn PDF document text
    • http://repochka.site/belt_and_road_initiative_for_win_winmgg8p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_6052aa62641c9.pdfIn PDF document text
    • http://websecurer.tech/cancer_data_management_salary_2019vt9xo.pdfIn PDF document text
    • http://reduslimitaly.website/mekixotowr0u7x.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/7f79e928-e2b5-4c8a-ab62-5968fd60a45c/32258021366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a26e74-bffa-44ea-836c-c9c86b00fdd4/lovida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d23bf09-ad04-4469-8763-1d4ead157e93/how_to_cheat_in_little_alchemy_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f697b3b-0133-4ad0-bf02-f44f8aad5867/what_age_is_the_twits_suitable_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee61c6f1-d7c0-4b75-8cc2-546fae37aaf2/40701497979.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_off00013db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB4 5168 bytes
SHA-256: c79a085e0bd32f6f4d13b0014ade93d25e95a73132b774c56d7dac89117a596f
font_01_sfnt_off00014f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F68 11888 bytes
SHA-256: 4375e2905282f8692bcd27c58ab3d2a4b55e8cbc21b9032c27151c4a7a1475ac

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