Malicious PDF — malware analysis report

Static analysis result for SHA-256 49eff511d8188678…

MALICIOUS

PDF

80.3 KB Created: 2021-03-23 03:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 35a4a91ab5f592d720d9f6a9ed29d821 SHA-1: 5050322eb690d110c4bc665e4735daa87a8d511a SHA-256: 49eff511d8188678c0ec88189ea05bedce09a877590148c5de891895ed9bf500
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 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.
  • 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://zajinet.ru/strik?utm_term=farberware+food+processor+how+to+use PDF link annotation
    • http://gimogorox.22web.org/bioteknologi_konvensional.pdfIn PDF document text
    • https://cdn.sqhk.co/gagupibi/uqijGhg/gagogopaxonedisetogabu.pdfIn PDF document text
    • http://zinepifulew.22web.org/desktop_calendar_design_vector_free.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/cginjcb/bubble_bobble_evolution_psp_gameplay.pdfIn PDF document text
    • http://vodonepivek.22web.org/how_much_does_a_deer_weigh_at_birth.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/7wjdgd3/gusoguzotaxopemodoziruja.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/8jfUbRm/extreme_moto_racing_3d_apk_update.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/okiOhdu/car_shield_protection_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/sesumaku/hgjJyAT/wallpaper_anime_1366x768_hd.pdfIn PDF document text
    • http://azakalaza3.xyz/epson_iprint_iphonemlwbb.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/juUdcNS/tajurapiboj.pdfIn PDF document text
    • http://mists.space/18450520780udqa9.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/agdUjgj/58280962890.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://takamuwemevofe.epizy.com/video_player_for_windows_32_bit.pdfIn PDF document text
    • https://801a9f91-e12c-4b3a-b535-42c3eaff61c8.filesusr.com/ugd/d237ef_14e1020011394804b50d230399821127.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c29801-e946-423b-ac40-c1b9bae087c6/zafage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e26755-9b86-4dcf-84b9-14c386232fee/fakubugoguzip.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_aa359054cbb54df78617c7a244e304fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d1ff0c-793e-4f85-9738-c14780e7b4a4/o_praise_the_name_chords_key_of_a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF31 5124 bytes
SHA-256: 841e200fdecd0b50ecb21e50afe35f035828d20289c9536adfab6c400157d92c
font_01_sfnt_off000100c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C4 10924 bytes
SHA-256: 4cee04c17613103563e6bc30ccf8dccc771ae451225117b93f449330c62bec6d
font_02_sfnt_off00012600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12600 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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