Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f77493dab861b85…

MALICIOUS

PDF

84.5 KB Created: 2021-03-29 21:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c2f116e4fdfe30ef308491a098c22ea8 SHA-1: cf557724e9ceb32dc7f6c601f9f5e03784c64284 SHA-256: 2f77493dab861b85c9f2d8dd955db4415dd693f95895558391f0d28766bd8c2d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains metadata related to PDF conversion, suggesting a deceptive pretext.

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://xajibur.ru/award?keyword=save+website+to+pdf+iphone PDF link annotation
    • http://love-cosmetics.shop/rojemajoralevugirne27.pdfIn PDF document text
    • http://igcopyrightclient.com/didurisixi5c2kt.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/7BHhchc/background_music_bollywood_songs.pdfIn PDF document text
    • http://nazhivy.net/mastering_ansible_downloadw3jbx.pdfIn PDF document text
    • http://prizinsta365.online/xivijofopuveat178.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/guzaraninuleko.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/78367313526bn57i.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/whaIqib/how_to_write_a_business_plan_for_freelancers.pdfIn PDF document text
    • http://bupetud.xyz/grammar_english_book_cambridgey756p.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/galokirojurarawu.pdfIn PDF document text
    • http://goldstein.capital/wakenusobozgnj.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/mTcgchf/ice_quest_scholarship_interview.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/OW3ichj/30830414193.pdfIn PDF document text
    • http://cloudplay.xyz/js_games_code86mxs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_c72575f352d640b08e15ca12f1c28b7e.pdf?index=trueIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_1522301cd32f447b82cfda5db07a3bfe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/roxonajuboki.pdfIn PDF document text
    • https://4ab51db4-2ab9-4ce7-8cf9-a7235cd4f8a6.filesusr.com/ugd/c6359c_e3045c328b6f450c8247fb13c76b5a7d.pdf?index=trueIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_6a6e9a175ef945b586ac966452f8b2d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/afk_arena_mod_apk_god_mode.pdfIn PDF document text
    • https://4fbc56e1-d9a2-4996-be1d-38f9cd263936.filesusr.com/ugd/b1afee_3d6709e379b0441490b8c6569fdf858e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/what_is_washington_state_prevailing_wage.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A22 5396 bytes
SHA-256: 52b05cbef8bf41b813ff40eecc9a66a33ec4ec02fc32b46771173c3f572efbe6
font_01_sfnt_off00011c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 11248 bytes
SHA-256: 32110cbf7ebbb7d94e95fc1b73459349aaee40883759beec4072d1c2d23c4e9d

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