Malicious PDF — malware analysis report

Static analysis result for SHA-256 254eb2a926625eaf…

MALICIOUS

PDF

74.0 KB Created: 2021-03-31 11:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e78146467a278db43f3ae936aeb26a08 SHA-1: 705d904c82c7a9b938f0f9d4e252b95ac08f7f2b SHA-256: 254eb2a926625eaf4d6d317085d9309b7d352bf3e38e61ddc2ac85010efb4900
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/wix?keyword=largest+american+companies+in+peruvian PDF link annotation
    • http://getsalon.xyz/web_browser_video_er_mace01h2.pdfIn PDF document text
    • http://wigobike.sportsontheweb.net/pearson_pre_calculus_12.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/Nhedhax/the_hurricane_heist_2018_parents_guide.pdfIn PDF document text
    • http://wiinorama.website/fivulufosezutekadepedunz5u65.pdfIn PDF document text
    • http://lestyprin.online/history_of_muslim_civilization6rdt4.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/ibQjhoe/49439787163.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/GMngjii/pagenejovutijive.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/hhhieOH/deer_hunter_classic_mod_ios.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/50642929920.pdfIn PDF document text
    • http://twirlini.com/moto_z_camera_mod_review2olxi.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/Riijieq/great_alchemy_500_combinations.pdfIn PDF document text
    • http://connexion-amelii.xyz/oticon_hearing_aid_appgxkdd.pdfIn PDF document text
    • http://arm-watch3.club/stihl_chainsaw_manual_ms271an01c.pdfIn PDF document text
    • https://cdn.sqhk.co/fokatekox/fMhhHij/lemewegew.pdfIn PDF document text
    • http://leaninrzpd.site/famous_stephen_king_book_quotesova77.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/hhaz3zE/multi_repost_download_and_repost_for_instagram.pdfIn PDF document text
    • http://gakmancreatures.ru/diy_beard_mask_free_sewing_patternmvccz.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/eb5820a9-fc50-4844-88ef-f8f21972b900/jeliropuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0d6692-b55f-4abe-a042-ed28cbda6ec4/gebomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92cb64e3-a7a5-4f62-b56a-2c8e270e8e66/the_power_of_a_praying_husband_book.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_off0000e5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CB 5224 bytes
SHA-256: 8407e84c7b8ff710cc050d2890c739d01d66d9438ac39a4f6cc91150d3974453
font_01_sfnt_off0000f78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78D 10264 bytes
SHA-256: 6dbad1f7c8fa8dd3b5d9e1b15be7b3b5b81973f6d51322aaf03db9d2a44aa64f

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