Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f1d85ef0f57a9f…

MALICIOUS

PDF

101.2 KB Created: 2021-03-14 03:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: decd8749c2696608de8b3df2584f28ef SHA-1: 8f34d570cc5a633f5c448d814b7bf62040b81bbb SHA-256: 32f1d85ef0f57a9fb91f97b0dc9055e0a6350500ac71ae9c71e3bff2be4690bb
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/123?utm_term=cube+escape+room+answers PDF link annotation
    • http://hrushch.space/fiwolosiladiximarejexi2o3l6.pdfIn PDF document text
    • https://cdn.sqhk.co/dosovejozeb/cjdjgib/mebogomefebedonowakabega.pdfIn PDF document text
    • http://wordsidepost.top/what_is_better_llc_or_corporationadbdr.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/47439892081.pdfIn PDF document text
    • http://munasimowijuxi.getenjoyment.net/briggs_and_stratton_technician_training.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/ggbcOtR/23976629812.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/widgLic/29038527720.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/pixexorozegodera.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/F0hbBhB/hit_songs_of_the_60s_and_70s.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/fender_mustang_iii_v2_presets_download.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/can_you_cook_a_turkey_in_a_power_pressure_cooker_xl.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/flashback_x4_looper.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/chbczZy/powikekexurataxu.pdfIn PDF document text
    • http://vitonidero.medianewsonline.com/79645152949.pdfIn PDF document text
    • https://cdn.sqhk.co/nemalerute/RMtjfgc/panda_footie_pajamas.pdfIn PDF document text
    • http://grusha.space/gmail_inbox_emails_disappeared380l3.pdfIn PDF document text
    • https://cdn.sqhk.co/lutadamafe/gjFjaib/daily_checklist_printable.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/free_archydro_for_arcgis_10._2.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/sample_delegation_of_authority_form.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/56666525036.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/craftsman_garage_door_opener_remote_green_button.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D30 5184 bytes
SHA-256: 2837e0742ca13bc75e66250c0497e6b556c6b5ddc1000fb350828f1462c239f2
font_01_sfnt_off00015ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC6 11296 bytes
SHA-256: 9b533152deea2d55d7a81b6cbc9a0dc9987521b95003f0a7ff8ac98bfe33e8df

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