Malicious PDF — malware analysis report

Static analysis result for SHA-256 570d0b898f9045b5…

MALICIOUS

PDF

72.5 KB Created: 2021-03-08 01:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 140ee49ef5d17fec0d95275787c6d566 SHA-1: fa05731c5dbc446fdf765f8b3c850531ede881cf SHA-256: 570d0b898f9045b5a0f37a4959bc449eb5e6be321b946005f58e2c78fffe175f
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, contains text related to setting up a wireless fencing system, likely a lure to disguise the malicious intent of directing users to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/123?utm_term=how+to+set+up+petsafe+wireless+fencing+system PDF link annotation
    • https://vudovonijojor.weebly.com/uploads/1/3/1/4/131437364/0b1b9bc6.pdfIn PDF document text
    • https://namovisurov.weebly.com/uploads/1/3/5/3/135338224/tidiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489407/normal_600f2b031b33e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454303/normal_6010cebabf95c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446489/normal_6003413759a23.pdfIn PDF document text
    • http://reform-st.ru/289964213128cf5x.pdfIn PDF document text
    • https://lizakefamejoxen.weebly.com/uploads/1/3/1/3/131384135/zidur.pdfIn PDF document text
    • https://simefaburiso.weebly.com/uploads/1/3/0/8/130814859/de50c.pdfIn PDF document text
    • http://bluebadgeform.com/telecharger_bouteflika_une_imposture_algrienne_gratuiteves8.pdfIn PDF document text
    • http://cuzinfo.ru/great_little_war_game_2_apk_full_modmoles.pdfIn PDF document text
    • http://trynutra.shop/80763220849kcbiu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443802/normal_5ff947f26c951.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/juzinaramip/47035988645.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/absorptive_capacity_theory.pdfIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_f4cfffb8339143d5bb4ebc53c832f960.pdf?index=trueIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_207e94f431b849279e92b45ad228eec8.pdf?index=trueIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_cff75af1157843538a2a944d4c91fb8c.pdf?index=trueIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_c3b039dd0b13497aad15399a1c07eea2.pdf?index=trueIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_bf137d703be0441c8d4d4c5fb958b2e1.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_off0000de0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 5488 bytes
SHA-256: 6ff9970ccba697c46dc3eed9ceaf17276c1bc8b98ab0934094a696fe473d7bf5
font_01_sfnt_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 10664 bytes
SHA-256: 22414ac51610579fdc8b4ae3758425804764ebb931dc0d4c0fe475a00488fe7c

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