Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2e8be85217df74…

MALICIOUS

PDF

80.3 KB Created: 2021-03-09 23:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0d179fed672c4c2686c2e09c9e847f SHA-1: 9a71333788fa611f597fc4275ff8e12d2498dac6 SHA-256: ea2e8be85217df740810cb90a9ebacec00537dc0bee91075cf58a3bb0291882a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful sites, possibly for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=exponential+growth+and+decay+worksheet+algebra
    • http://biwiroxefamir.mywebcommunity.org/69301612199.pdf
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/fejazufeminezak.pdf
    • https://ziganuridu.weebly.com/uploads/1/3/0/8/130815115/dexijufig-tarudinukasab-tasefaj.pdf
    • http://pofuxubilet.sportsontheweb.net/bowflex_power_pro_leg_workouts.pdf
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/7192dfa.pdf
    • https://kawikixefi.weebly.com/uploads/1/3/5/3/135388441/4269285.pdf
    • https://dojobojijiwum.weebly.com/uploads/1/3/2/6/132681334/rawuw_vozelubufud_tojopederenoxav_luzoju.pdf
    • https://kubegagalinono.weebly.com/uploads/1/3/4/7/134714436/af48dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_5b04858d9ba84ff9ae1f2850f881fc42.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ef0dc110-5691-40e9-b8c7-7445d7b4fae3/how_to_pair_logitech_k400_plus.pdf
    • https://uploads.strikinglycdn.com/files/4f89da6d-45cf-48a3-950b-013b4a660e08/what_board_game_should_i_buy_next.pdf
    • https://uploads.strikinglycdn.com/files/b8a2f54d-c35f-4dbf-8ad3-7e22110abb79/schlage_fe595_rekey_kit.pdf
    • http://lumosaneja.onlinewebshop.net/11014294666.pdf
    • https://uploads.strikinglycdn.com/files/ea34fad9-5caa-4cb7-a3b0-b0b81d529d30/why_is_my_spectrum_wifi_blinking_blue_and_white.pdf
    • https://uploads.strikinglycdn.com/files/76c2244a-0e31-439f-a123-0d06ea7fdf26/sas_ods_graphics_syntax.pdf
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_8329d23334f64360b994161a772b187f.pdf?index=true
    • http://bitenozof.atwebpages.com/how_to_get_started_gunsmithing.pdf
    • https://uploads.strikinglycdn.com/files/db8a37bd-85de-4548-9b0a-c396c7d5dd90/napekukaju.pdf
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_9b2d464c45254e03972fc3574335726f.pdf?index=true
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_e9b3cd1553f34688a0152f7416f05edb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9345a65b-0671-424a-bc62-264dcd87c1c9/math_kangaroo_2019_questions_and_answers_canada.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebaa.bin
a921598441791ecd08c7fffefc3f617e177f367ead443b35f7599d87a8190b1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAA 4244 bytes
font_01_sfnt_off0000faa3.bin
7737ef19cf9825bda93908bb0287a7d4bd5992be5220732c149c826766427959		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA3 5760 bytes
font_02_sfnt_off00010e53.bin
bab6fc864751d8793e58ad3e4133fe53c189cb1fac64b76e781b6a90721c2f41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E53 10856 bytes

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