Malicious PDF — malware analysis report

Static analysis result for SHA-256 a97f975a0d12180c…

MALICIOUS

PDF

68.0 KB Created: 2021-03-30 22:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: fb32ebdf75b484e36939f589e1321ccc SHA-1: 4497aad6d15725c40d51bc7bad8d072896740df0 SHA-256: a97f975a0d12180c12e5ba56a03738301a2ad97b5c0077434f612d2e350f2f16
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to redirect users to various potentially malicious or scam-related websites. The presence of external URIs and the overall detection by security tools point towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://xajibur.ru/award?keyword=bm+sakharkar+pdf PDF link annotation
    • https://lideteli.weebly.com/uploads/1/3/0/7/130775407/ninesapuwurebepusu.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/237075057x6wst.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/hhe9jfo/66632654772.pdfIn PDF document text
    • https://cdn.sqhk.co/bularalunop/gd7hhON/1672596957.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/gfjgiaA/gauss_meter_app_iphone.pdfIn PDF document text
    • http://trastenmyqort.online/bose_soundlink_mini_2_firmware_update93br2.pdfIn PDF document text
    • http://haustova.com/sorovurojurog7tq3.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/jc3gfDD/spanish_english_translation_app.pdfIn PDF document text
    • http://how2clever.com/54907956000ylull.pdfIn PDF document text
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/4bfcedd1f.pdfIn PDF document text
    • https://cdn.sqhk.co/salejejo/n3Fyicd/54247604032.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/tiluwisulepam/kubitalewuvifij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece54186-b3eb-4dac-a5fe-305f29759716/70427944487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757a5e1f-07d2-46ab-aa6b-0ebe9cf5fe0b/take_five_oil_change_dallas.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/kumpulan_game_action_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b0e577-5b1a-4bdc-976c-5abcb1f215cb/cooking_mama_mod_apk_unlocked_all_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e3ebc2-91af-454e-88d5-6b46195b5d52/how_much_do_starbucks_baristas_make_in_denver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746097da-12bd-4aa2-bc96-4682541f190f/sigepojelosinoba.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/lujovuwuv.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_off0000ce61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE61 5360 bytes
SHA-256: 21687dc5ee61ae62a76e404d1020ef93c2ba4f2e1b50c2170a95d26f42ce3c47
font_01_sfnt_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 10084 bytes
SHA-256: 1ee9d81c4b4dc081db660c4190d67782c397796dfb7ac9bcfa5d825f36f91ff2

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