Malicious PDF — malware analysis report

Static analysis result for SHA-256 82948bd28e8ccbd9…

MALICIOUS

PDF

96.4 KB Created: 2021-05-27 19:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a5d2ff31b9ba10b9a27ddee62ac7af49 SHA-1: ca898b6440a74424bce805aa362319c23518e2d4 SHA-256: 82948bd28e8ccbd91bfd0c93e801f5a5fe76ecbbc15a0c7774155ea58dff495b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The primary URL, 'https://botokaw.ru/strik?utm_term=the+pearl+john+steinbeck+pdf+free+download', is designed to lure users with a search term for a popular book, likely leading to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=the+pearl+john+steinbeck+pdf+free+download PDF link annotation
    • https://pigodebi.weebly.com/uploads/1/3/4/8/134864190/kibikabem.pdfIn PDF document text
    • https://sowubibuf.weebly.com/uploads/1/3/4/3/134308786/3489966.pdfIn PDF document text
    • https://gowapatemik.weebly.com/uploads/1/3/5/3/135319450/8ffee8b080739b.pdfIn PDF document text
    • https://fawewetipe.weebly.com/uploads/1/3/1/3/131379545/6781912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_5fd7091b37270.pdfIn PDF document text
    • https://xadadoroz.weebly.com/uploads/1/3/6/0/136024884/zizonasunawefofik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470687/normal_60516b14836f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372719/normal_5fefd55da7616.pdfIn PDF document text
    • https://refodalisa.weebly.com/uploads/1/3/4/4/134437853/nakusaposobilol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493550/normal_605f2ad1b04c8.pdfIn PDF document text
    • https://rizamarorupewug.weebly.com/uploads/1/3/4/5/134527102/2401233.pdfIn PDF document text
    • https://vugaxedugu.weebly.com/uploads/1/3/5/9/135971543/f8f71319a82d158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481275/normal_6020777cf034a.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/1997912.pdfIn PDF document text
    • https://fadibukomu.weebly.com/uploads/1/3/4/3/134310842/7739bd27136f1.pdfIn PDF document text
    • https://poliradu.weebly.com/uploads/1/3/5/9/135991332/1689961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482638/normal_5fd92f0f7183f.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://uploads.strikinglycdn.com/files/5d542bc3-7265-4741-aedf-315399b9fd98/76208929310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2da6c8-3e45-4d5c-90d5-c7413be7212a/juwawevurakegupagakiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a180fa0-d995-43ae-a1a8-e7860f9bcc14/jazadekapeneb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001262c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262C 5352 bytes
SHA-256: e249081358bbd724aecd86aa36108cc36eea60619e88fc64f8236969f8771e37
font_01_sfnt_off0001385d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385D 15332 bytes
SHA-256: 125ef151fc72d36424c16aa4de33769b64e869b15d998f9c961fdad0ffa45ce3
font_02_sfnt_off00016443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16443 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361