Malicious PDF — malware analysis report

Static analysis result for SHA-256 7688e7fe91bdf30d…

MALICIOUS

PDF

70.1 KB Created: 2021-02-27 08:26:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8fc33fc63f93813c7d08388354a2b590 SHA-1: ee4881b5b6a4cccba59bb07f6ee9c7771f581689 SHA-256: 7688e7fe91bdf30d3b09b16a0dcfccd4f7c7041f2c701f12c112be8d0deedb5e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to potentially harmful websites, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=how+to+connect+to+altec+lansing+baby+boom+speaker PDF link annotation
    • http://katipef.medianewsonline.com/86230622564.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/what_is_order_in_sequence_in_oracle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421476/normal_5feea109601a7.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/35782031399.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/8709890501.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/26289129149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476301/normal_6039c23c18dc2.pdfIn PDF document text
    • https://cdn.sqhk.co/zeputefilu/Ohchfgh/colorful_cross_stitch_trim.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/hvl6gcK/penugekegumadasapif.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/56179999698.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/gzcifzx/lovopisibo.pdfIn PDF document text
    • https://cdn.sqhk.co/vinusubat/eMieXib/simule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422906/normal_6005eaf8e4847.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/zunewidimem/mubopebazedexu.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/button_game_vector_free.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/when_should_i_receive_my_ssa_1099_for_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/glock_micro_conversion_kit_legal_in_california.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_off0000d393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD393 5612 bytes
SHA-256: f19dfd68bc7bb6476706427bad77a4b24e96c3a42cc0a4d8f990378acf316d1d
font_01_sfnt_off0000e6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A8 11268 bytes
SHA-256: 24751964b139a4ee26fb7afe2232cb8f565afa097e0a4113a645d10546742257

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