Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a10310a04928e5f…

MALICIOUS

PDF

90.1 KB Created: 2021-03-17 04:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d4f10ff0b6432429b0f2972d56de17de SHA-1: deeb0c353a29a0f05a45708bcc6357a8e9f49c1f SHA-256: 6a10310a04928e5fbee4fe6342607bf24161a2a02bb3cc65261f64a8661b1cc6
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://mezovuduw.ru/wix?keyword=final+fantasy+mod+apk+offline PDF link annotation
    • https://gogodelile.weebly.com/uploads/1/3/0/9/130969080/c4916bdb.pdfIn PDF document text
    • https://pabarubuvu.weebly.com/uploads/1/3/1/3/131379718/puxesifovumorufa.pdfIn PDF document text
    • https://xuvodovujekezoz.weebly.com/uploads/1/3/5/9/135957716/vegotodejewabo.pdfIn PDF document text
    • https://gorefete.weebly.com/uploads/1/3/4/6/134630025/buvemadewemidi-vezirubifij-sanuzexufirozu-busatewarud.pdfIn PDF document text
    • https://zimuvudiredefux.weebly.com/uploads/1/3/2/7/132710782/07f0dd27a7f7bc.pdfIn PDF document text
    • https://kominalekawer.weebly.com/uploads/1/3/1/6/131636772/wesepalipitov-rogadutudi-bapumovix.pdfIn PDF document text
    • https://sifirugosiwoxam.weebly.com/uploads/1/3/1/3/131384024/3799831.pdfIn PDF document text
    • https://mopirolelawa.weebly.com/uploads/1/3/4/0/134012876/66e0f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d92d839-648d-4475-83bd-2b5684cd4e32/92709400846.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_1e20c40252ef4a078c73077d127ac4d8.pdf?index=trueIn PDF document text
    • http://pamakejexo.epizy.com/difuwalomowonuxov.pdfIn PDF document text
    • http://wagadepepixapu.epizy.com/rativasajefababiteb.pdfIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_6d31885cf99c4442883f1124b44349e3.pdf?index=trueIn PDF document text
    • http://rovuwuruw.epizy.com/83057081721.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_ed68b18da4b64a7ab1b5e61b237b52a1.pdf?index=trueIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_966cc81ebd8c45b3bf8cc825909ba320.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b28f9a-573d-42dc-97d8-1622d0d2e3c4/61006448950.pdfIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_e88b245abe154f88b4735374176d04fd.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 2956 bytes
SHA-256: 7135dc27119678be8d400a26270fb479e9cb22b514360c8de7678b4690c14cb2
font_01_sfnt_off0000ff23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF23 5212 bytes
SHA-256: f149abe4ed4f30eb0a5b3024f8666a152c30b094bf0151027560eeb68f95e336
font_02_sfnt_off000110dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DD 1936 bytes
SHA-256: 246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3
font_03_sfnt_off00011a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1E 13444 bytes
SHA-256: 5857025f46883ebad8137239e7dba8adc5aa776edd2b31c82b7977d9467faba6
font_04_sfnt_off00014542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14542 16128 bytes
SHA-256: 845f5a93f84d7004349add460c6c9c46ed28b588fd795f2445caa4f06b05139a