Malicious PDF — malware analysis report

Static analysis result for SHA-256 7440a65e288e59e1…

MALICIOUS

PDF

87.8 KB Created: 2021-03-01 02:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f70f8a460fc282248900c330be8475d4 SHA-1: c8ddfd66ddb30c90d00d7e79f7ec26ef6925862e SHA-256: 7440a65e288e59e18f3137261807a6e373616c1df918fb6cec9ce9b28e176569
166 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits suspicious characteristics, including an invisible link pointing to a potentially malicious PDF hosted on the domain 'com-login8.xyz'. The document also contains numerous external URIs, suggesting it functions as a link farm or a lure for further malicious activity. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/award?keyword=mma+fighter+diet+meal+plan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488817/normal_60234bb7e3f1c.pdfIn PDF document text
    • https://cdn.sqhk.co/momogajopi/iezZ7En/tikujipamubuseritesuxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369185/normal_600798e18c411.pdfIn PDF document text
    • http://fegalaro.iblogger.org/dehydrator_sheets_for_fruit_leather.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5fdfa8b11731b.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/ja6jajd/17802764341.pdfIn PDF document text
    • http://com-login8.xyz/numerical_reasoning_test_1d6fnj.pdfIn PDF document text
    • http://service-hire.com/old_keyboard_phone924h3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446781/normal_601f623837007.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/odBNXia/evolution_board_game_strategy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_602b290fb7990.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/cib5jjm/mineblast_apk_download.pdfIn PDF document text
    • http://5gusevshop.space/pifedogawijivedna7il.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/ggjhjia/wotugoresewewo.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/geJKp0q/vononuvevu.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://bawepefafaz.rf.gd/garelunalimezu.pdfIn PDF document text
    • http://pomigipasa.epizy.com/woxavemov.pdfIn PDF document text
    • http://nidomovux.epizy.com/kakod.pdfIn PDF document text
    • http://runisinifozi.rf.gd/sub_zero_refrigerator_drawers_700br.pdfIn PDF document text
    • http://tujemagus.epizy.com/local_anaesthesia_in_dentistry_book.pdfIn PDF document text
    • http://dusiwesidixe.epizy.com/polunijejodituge.pdfIn PDF document text
    • http://gujivixamiwol.rf.gd/vukow.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_off0001104c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104C 4960 bytes
SHA-256: 9e7a11a5271c62643438913e9edcc923103a38c9956d928712a73d7f18f7d9dd
font_01_sfnt_off000120fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FE 10176 bytes
SHA-256: 54f7c040bf45f0046b69afe129c1d5aa36118bb22a8f14ae1e2f8b183fa54b9a
font_02_sfnt_off0001438d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1438D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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