Malicious PDF — malware analysis report

Static analysis result for SHA-256 124fa2574aa82ddd…

MALICIOUS

PDF

101.8 KB Created: 2021-03-29 06:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 525b25d5343ce85c17c443a00849781a SHA-1: fa4e6660d52f3c08f3b458360699a092a7ae62c4 SHA-256: 124fa2574aa82dddd31e14cf1c3d2235ae604950eba6a064ac3d666500b903d5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. The file contains a large number of external links, suggesting it functions as a link farm. One of the primary URLs observed is https://bologen.ru/wix?keyword=carmelita+fox+concept+art, which likely serves as a lure or entry point to further malicious content.

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/wix?keyword=carmelita+fox+concept+art PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464521/normal_5fd08d60dd155.pdfIn PDF document text
    • https://vofirojaj.weebly.com/uploads/1/3/1/6/131637635/xiwanisetuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383929/normal_5fc56d7a85a5c.pdfIn PDF document text
    • https://ropedali.weebly.com/uploads/1/3/0/9/130969406/1284364.pdfIn PDF document text
    • https://mejiwixibunoxu.weebly.com/uploads/1/3/4/4/134402053/2594219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_60170094d7be9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410002/normal_6037243671bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_602b26b78ef96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_0b230eca79634b71b8df626a5857e20e.pdf?index=trueIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/place_value_worksheets_for_grade_5.pdfIn PDF document text
    • http://desujiruvomeb.myartsonline.com/56358302719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ca1e9d-3103-4fda-8fc3-c0317fa48b78/82082970420.pdfIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_ad229175828240efa82f5a7839cc9c7c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a6f6ef-861a-451f-b04c-6bf3cd997ba7/73711362578.pdfIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_df76d58082014477ae7cc7c697472986.pdf?index=trueIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_c40a775ac0c34d16b5341207391a7695.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA9 3444 bytes
SHA-256: 9de3a6de8f02ae10745e970bea483da85617569bef6e47a0a7126e52b7c7ca09
font_01_sfnt_off00014b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B00 4956 bytes
SHA-256: 92b58bc9d3fc42cb8fb5fc5460b48639b28808f5f3d2dfd98c6a404e470086fc
font_02_sfnt_off00015bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BCE 14876 bytes
SHA-256: 167d858a4eab49310cb00204b63dc5f76f6a68575b0f4fffb24789551164b5d5

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