Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc8f0903db38c2b…

MALICIOUS

PDF

89.1 KB Created: 2021-04-01 14:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 72a90ed862cbedc3d4baf2653b1884bc SHA-1: 0871fec648e5676b9d9831b78ebb3fe84d6e51bc SHA-256: 9fc8f0903db38c2b647346bdcc1570d1f1932ba8a2968d0fa24641e7d78c4e25
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URLs, such as 'https://xezojetit.ru/wix?keyword=ff14+gil+making+guide', are likely used to redirect users to malicious sites. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a phishing or malware distribution attempt.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/wix?keyword=ff14+gil+making+guide PDF link annotation
    • https://vixagudidiw.weebly.com/uploads/1/3/0/7/130775505/japugajuvuz.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/9109748.pdfIn PDF document text
    • https://cdn.sqhk.co/togodawexu/hbIHrif/jidijuwavedagupuv.pdfIn PDF document text
    • https://lazabegikazake.weebly.com/uploads/1/3/5/3/135315211/7509508.pdfIn PDF document text
    • https://daxixulo.weebly.com/uploads/1/3/1/0/131070202/zorelo.pdfIn PDF document text
    • https://cdn.sqhk.co/zakikola/QJieTQF/emergency_room_cost_for_asthma_attack.pdfIn PDF document text
    • https://cdn.sqhk.co/rowunozimop/jjbgeOd/pc_building_simulator_android_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/bawivurolut/HgeQhjc/classic_phoenix_arcade_game.pdfIn PDF document text
    • https://furiraduwonejos.weebly.com/uploads/1/3/4/8/134870793/jufaxo_nasaj_xatepunelome_kirejoze.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/zicjfa7/english_songs_2020_remix.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
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_f284a36120cf4fa286b504c9f19c7206.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88199b49-dc1c-4df0-b387-ea0dfcc1a386/vilura.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_63d131c229ae4e2891fdf3eed2427f4c.pdf?index=trueIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_29a66cbc671049cda704715da6580a83.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6afef67-1010-41c8-b89a-e66ae14ebde4/bvmc_pstx91_mr_coffee_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5215fde-e4c2-4536-9aa2-901a654d90e7/rainbow_vacuum_se_price.pdfIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_1b585658ddc44faca7b6e65c9dba8a8b.pdf?index=trueIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_5a1db897c83846ebba3c3bfd74143502.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/870e1ef0-28d4-401e-8981-00285ee3d0ec/oster_blender_pro_1200_with_glass_jar_24-ounce_smoothie_cup.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_d3b381322fe64932b45797d8fbb4c0cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01e7a4b-15c0-49cf-b27c-8d0067a0eaa5/xerakibabagobus.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_off00011129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11129 4804 bytes
SHA-256: a0fcfc6eb5943668174286e92029ea3ab2dbcad6b6c7c1a50b571373f5dcf9e5
font_01_sfnt_off0001216a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216A 11580 bytes
SHA-256: 54468edf829ac9d59b5f64c62ca0604dcca158b74e40814a08c2b1ac82061fbd
font_02_sfnt_off000148b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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