Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ace4407012be629…

MALICIOUS

PDF

76.0 KB Created: 2021-03-09 04:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8812a5223023632dd87b7280663056be SHA-1: f8e381273485dd20e6ff186afee9c27fec51b761 SHA-256: 9ace4407012be6293430918c8487da5234766955d40f19d82c928bc820c0e5dc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs like 'https://lozipotod.ru/wix?keyword=go+launcher+ex+4.17+prime+apk' and 'http://prostotit.site/64195984228j7wlv.pdf' are likely used to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=go+launcher+ex+4.17+prime+apk PDF link annotation
    • http://prostotit.site/64195984228j7wlv.pdfIn PDF document text
    • http://fullstacket.online/hungry_shark_evolution_pc_onlineq7ni9.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/U6NEiim/adidas_slides_womens_purple.pdfIn PDF document text
    • http://voyazh-shina.com/how_to_upgrade_to_omnisphere_27nqte.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/kusemogc0mft.pdfIn PDF document text
    • https://cdn.sqhk.co/rafumufo/Kgfijgg/dreamers_by_yuyi_morales_read_aloud.pdfIn PDF document text
    • http://obuv-kozha.ru/13545466751i5rww.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/hiWQDiF/mirror_workout_price.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/egZDhfH/55922601586.pdfIn PDF document text
    • https://cdn.sqhk.co/zirevazul/jfdijDX/grid_photo_collage_maker_square_art_pic_collage.pdfIn PDF document text
    • http://naturaitalia.space/xem_bi_c_khanh_thi_hw5soh.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/jajbiam/happy_wheels_online_not_demo.pdfIn PDF document text
    • https://cdn.sqhk.co/xetilibul/VhegjmV/21709318841.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/ghjijaz/65861022703.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_3369a6b5aaee411f83cdd9ff4403a39f.pdf?index=trueIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_b28cb248913547f9b2c66ab22c5d2fa5.pdf?index=trueIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_d663a54631564e3d96a74a102f78020f.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_b5a68019d0584b19a449e0b0b01aff70.pdf?index=trueIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_9b78ee71d5b64214a10908568e90af68.pdf?index=trueIn PDF document text
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_e2193fb50ff543429ca952f27a1751c8.pdf?index=trueIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_948284d0cd894d9d8c4f686798fcdac8.pdf?index=trueIn 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_off0000ebda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDA 5408 bytes
SHA-256: cbf1c9c6f8bc79daeaa916cf01bd01ec7b76024d7e1c9e0ead79758021c5ea7d
font_01_sfnt_off0000fe32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 11264 bytes
SHA-256: 7fdc2e962ccbe248356feaf75a151478363f5b1d49f614d23e01c2d14eb47093