Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58de58502226a22…

MALICIOUS

PDF

79.2 KB Created: 2021-03-13 22:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 723774eee57c7dd3a4fe4f22893702d0 SHA-1: 3de463b19f47c6aba11614c8c3137643d62307f5 SHA-256: a58de58502226a227b551bbc98aa1ddfb6459cc21e1f6ccba84c6be5a52e5d62
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL with a 'utm_term' parameter suggesting a phishing or redirection attempt. The presence of numerous external URIs, including suspicious domains like 'botokaw.ru' and 'sqhk.co', indicates a likely attempt to redirect users to malicious content, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/123?utm_term=le+brassage+g%25C3%25A9n%25C3%25A9tique+pdf
    • https://cdn.sqhk.co/zokuwagopole/gichfzO/legend_of_the_sword_in_the_stone_lyrics.pdf
    • http://xoxosedefoxadu.mygamesonline.org/taraxobusefumetazo.pdf
    • https://cdn-cms.f-static.net/uploads/4408865/normal_603f548d4bcd7.pdf
    • https://cdn-cms.f-static.net/uploads/4499622/normal_600dbe085e7b5.pdf
    • https://static.s123-cdn-static.com/uploads/4401972/normal_6003eb4a6ef0c.pdf
    • https://cdn-cms.f-static.net/uploads/4461744/normal_6026f61fb6168.pdf
    • https://cdn.sqhk.co/gapobuzijiru/gHii3RX/gigabit_offroad_mod_apk_obb.pdf
    • http://worabipupe.mypressonline.com/eitim_bir_sen_aday_retmen_kitab_6_bask.pdf
    • http://libutulidux.medianewsonline.com/53898211043.pdf
    • https://static.s123-cdn-static.com/uploads/4405895/normal_5ff9f490ecccc.pdf
    • https://static.s123-cdn-static.com/uploads/4423189/normal_5fff96a185b1c.pdf
    • http://povulofi.mywebcommunity.org/how_do_breathing_exercises_reduce_anxiety.pdf
    • http://xemokajoled.medianewsonline.com/how_to_reset_a_holmes_humidifier.pdf
    • https://cdn.sqhk.co/xusopusavo/7ic8thd/givogivifodamivekotavu.pdf
    • https://cdn.sqhk.co/zenegiwowi/bzoy6Cq/air_jordan_1_dior_release.pdf
    • https://static.s123-cdn-static.com/uploads/4379222/normal_5fc7c64283df4.pdf
    • https://cdn.sqhk.co/buzaxelubot/GepOEih/vozurexoxeniviwuvusexez.pdf
    • https://cdn-cms.f-static.net/uploads/4467955/normal_60349963d6abf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_6b19427610904db3baabfefff4993e42.pdf?index=true
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_66c363c2668240ada6b6ec00d8c13aa3.pdf?index=true
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_019e7749f57a4a959aa0231886d4d83e.pdf?index=true
    • http://manuwakagekewu.onlinewebshop.net/kemitekaziraj.pdf
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_69c83261404f4336945bb377a84eae2a.pdf?index=true
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_4dac69d9a8e848b1b505e8757c774d40.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f349.bin
b2091a730748b32e5874e12a218ce31e0f2e29522637b37624f6bcaed2774290		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 5528 bytes
font_01_sfnt_off000105cd.bin
fa81c503fb33e44c06240bfc92233fbf335bde51d4eb777145a2096aeadb17b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105CD 12496 bytes

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