Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f56fbc30615b853…

MALICIOUS

PDF

86.6 KB Created: 2021-03-09 02:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d5e109ad9b41d009b2055175bf00f11a SHA-1: f566f9b7a73b6b68ff3780d277548682f2884f76 SHA-256: 7f56fbc30615b8533b036a1eab8726b8a5da17fb01f3661b6d5e970e7f017b63
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of a URL related to 'gta san andreas apk' indicates a lure for game downloads. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://seumenha.ru/wix?keyword=gta+san+andreas+apk+y+sd PDF link annotation
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/004992da93219f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5fd8e0d548f87.pdfIn PDF document text
    • https://jafobapobeloret.weebly.com/uploads/1/3/4/0/134017135/2543596.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/Yjcghau/94510059769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385434/normal_600659fa2af2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443362/normal_6024c3c74aa8c.pdfIn PDF document text
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/1781806.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/57jdUOP/zuponigexizoxuvekesuzomul.pdfIn PDF document text
    • https://rovijekamiveva.weebly.com/uploads/1/3/1/4/131437241/9311769.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5fced17255c0d.pdfIn PDF document text
    • https://cdn.sqhk.co/lusikagidet/jvGih4X/49444482348.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/hg3iRTS/business_plan_proposal_document.pdfIn PDF document text
    • https://cdn.sqhk.co/xiselaza/NgcmAih/63448788460.pdfIn PDF document text
    • https://vilekelapufixev.weebly.com/uploads/1/3/4/5/134508089/761e962e779.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/fgcV3ji/fopupatadepofulasesukil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_601b0cd3a2b4d.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://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_461a1a45f0d245d7afc8a1e205df24c8.pdf?index=trueIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_d89df15e44404f10847e5a7d7cd833ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4ec2f5-d4b1-4c7a-9e2b-8d41669b6ea8/how_to_find_probability_without_z_table.pdfIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_18101dbfde1e4667b8cfac5463da3844.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd4f95c-1139-4f39-9478-80d2f6195c19/25837471481.pdfIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_813dbb4df7c9416f8bad694b4b1acedb.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_3234e1bd91614784bb6da3ddb3654041.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86ed3a9b-ffc4-4656-b90a-3c798c9a7aea/56302747180.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 4748 bytes
SHA-256: e02fcfbd88938dfe1ef87d5ff0ecab2863d806318ca04575c0e0766c36e3a99d
font_01_sfnt_off00010455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10455 10240 bytes
SHA-256: ab255c633efb1012067139b8b1e0219cc5acd268fadcf4fac1f4b06624a0a18c
font_02_sfnt_off000127ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AD 16660 bytes
SHA-256: 1bef4f72345e0ce2876cefb4b25cc7aab2cae47a172854cd258bc05d305f53a1
font_03_sfnt_off00013dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34