Malicious PDF — malware analysis report

Static analysis result for SHA-256 c968e9117f91e321…

MALICIOUS

PDF

80.2 KB Created: 2021-03-30 23:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: eb8a4258f3216a3e0bf3d40ce17c2a55 SHA-1: 6aea4b70b00558a23108859cdf2fef228c5dddac SHA-256: c968e9117f91e3219da0d1645185c53397afb6a43a9e95d512e9d58fe58a6fd4
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external PDF files hosted on disposable domains, with one primary URL being https://botokaw.ru/123?utm_term=south+africa+new+hip+hop+songs. This suggests the document is part of a campaign to manipulate search engine results or distribute malicious content through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=south+africa+new+hip+hop+songs PDF link annotation
    • https://xitozenajoxoge.weebly.com/uploads/1/3/2/6/132681812/b02b9b99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469633/normal_5fc585bf05cd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_600cf3e5696e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_60415c12a44b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380393/normal_5ff4a68cab47f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_604e2fe693bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481830/normal_6026cec18c44b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472775/normal_6009184f186dc.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/zBhchcu/offline_rpg_games_for_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370087/normal_600306567348e.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/hkMBPjb/red_and_blue_jordan_11.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/jeBieWu/airtycoon_5_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449789/normal_604056d38c47a.pdfIn PDF document text
    • https://pagazamis.weebly.com/uploads/1/3/5/3/135310118/f8c983bd25ab66.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/mhj51vM/91187503144.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/hjSgjia/dwayne_johnson_net_worth_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_26c03f3e615a48a383dbdb65c75e4bfc.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_68dfe36b3a48426f9917a5366e166b06.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06abffa-04eb-45eb-8f32-5a20ebc4b88a/7075752041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/577f6aa5-9b4e-40b4-bda6-073eeeef2961/18385788778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59fff69-d25e-4353-a7c4-534eaf9363fb/que_haras_si_no_tuvieras_miedo_borja_vilaseca_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f43082d1-83f0-462a-9e8f-8435a52bd526/marantz_nr1506_specs.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 5440 bytes
SHA-256: dd1770bcc9aabf8547201e5f3ccf861053dd07b78a355c919785957d0bdbb798
font_01_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 11296 bytes
SHA-256: 19537e24fa4ec465c7336b278676db1c7045cbcc71ac9a379c8e32cb3a50ca66