Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5c5d3c3ecc5e02…

MALICIOUS

PDF

78.2 KB Created: 2021-04-22 18:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ac8234e10fe4e6b3e744034fe46a0310 SHA-1: c5bf04b4f7250a7146a7bc6b8b3e888706df7da0 SHA-256: 3b5c5d3c3ecc5e021dcfcf0e9dabdd57d9fb4135f9c89caf41538fa40b64e6af
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically targeting a search query for 'Tecumseh engine parts ontario canada' on a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive URL usage suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=tecumseh+engine+parts+ontario+canada PDF link annotation
    • http://bezprovodov.guru/why_is_the_us_light_orange_on_my_arris_modem05wtq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393628/normal_6040729f04773.pdfIn PDF document text
    • http://creampiepow.club/kadirejisawuofadk.pdfIn PDF document text
    • http://qunit.space/arabic_short_stories_downloadmzuzm.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/borurifovajep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425909/normal_600413be313d0.pdfIn PDF document text
    • http://scrlt.xyz/nenosovuduguzpyx.pdfIn PDF document text
    • http://efarbok.xyz/express_vpn_crack_reddito1che.pdfIn PDF document text
    • http://fufumizajo.22web.org/hypixel_skyblock_fishing_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387715/normal_5fd0650727b8f.pdfIn PDF document text
    • http://opt05.ru/how_do_you_do_a_digital_portrait3cb3u.pdfIn PDF document text
    • http://sallely.xyz/how_is_a_mla_paper_format6vjoc.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/v_live_dallas_mulatto5n9gr.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://sabixukavizom.myartsonline.com/ketexuri.pdfIn PDF document text
    • http://jolijugidepim.rf.gd/81230981723.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/74786436810.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/brocade_fabric_vision_guide.pdfIn PDF document text
    • http://gikukenal.rf.gd/renar.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/65659620247.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/11629983840.pdfIn PDF document text
    • http://mivurukelino.onlinewebshop.net/fedex_air_waybill_template.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/daroporeruvotejog.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_off0000e55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55B 5288 bytes
SHA-256: 694ccc8e3328218719133177d5f2fdda3a73439d1b68d833106c2fa749240483
font_01_sfnt_off0000f729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF729 11300 bytes
SHA-256: a9462c75b279e0016a391084a5453549e593b2091b15e77985e43dbec320b6f2
font_02_sfnt_off00011d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D83 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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