Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cff340851d23b1…

MALICIOUS

PDF

74.8 KB Created: 2021-06-01 14:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 2022ff5938dbc2b1b047e62968bcd369 SHA-1: 1375e9ea26c55ce103298ebd56e89823e046edb0 SHA-256: 12cff340851d23b1d5eef3c72d52abc9e45e4eed37f9c9f127d777be768b7435
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous external links, including one to 'catamma.ru' with a query related to obtaining a 'lunar moon in minecraft', suggesting a phishing or scam attempt. The PDF structure and embedded links indicate it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://catamma.ru/pbw?utm_term=how+to+get+the+lunar+moon+in+minecraft PDF link annotation
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/3a55e8c3e0f.pdfIn PDF document text
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/268512.pdfIn PDF document text
    • https://dupifexuxesopap.weebly.com/uploads/1/3/5/3/135348138/2981668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480170/normal_6011ad32bad14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382961/normal_603e8b5b0d2d4.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/659494.pdfIn PDF document text
    • https://tidurikax.weebly.com/uploads/1/3/1/8/131856133/dowuzanavewubusuven.pdfIn PDF document text
    • https://maposege.weebly.com/uploads/1/3/1/3/131378999/ff9043a43a7.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/bulafixamo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388293/normal_6003d86b37b5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5ffb61b974a00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_603b75fa32043.pdfIn PDF document text
    • https://jofovavugelizud.weebly.com/uploads/1/3/4/8/134855980/484d13bbd.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4451556/normal_60b5d47b631c0.pdfIn PDF document text
    • https://lemoxubasox.weebly.com/uploads/1/3/4/3/134329143/1508700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427820/normal_5ff34fcfef6c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_6022cb6b2da9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_601aab7f40d2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446774/normal_602e54ebb9144.pdfIn PDF document text
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/papotewa.pdfIn PDF document text
    • https://wovusowi.weebly.com/uploads/1/3/4/8/134886666/didewefa-wepesubeki-kivirob-wulage.pdfIn PDF document text
    • https://rodazikajoreme.weebly.com/uploads/1/3/0/8/130874285/9242910.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5fcb7794d1f8a.pdfIn PDF document text
    • https://gupasozulo.weebly.com/uploads/1/3/4/4/134471060/5049406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_602221fc52bfe.pdfIn PDF document text
    • https://mixusabap.weebly.com/uploads/1/3/4/0/134096097/7134999.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
    • 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_off0000d866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD866 5052 bytes
SHA-256: 3e30ca76d0cb03acdc19ee98fc7b14458efeb18a4bf4e10a6030fb8ba3cbb3fb
font_01_sfnt_off0000e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 11228 bytes
SHA-256: 505683599fc9c641bcd19c1706e1992956b86b306f8828f03f45bc1d21548868
font_02_sfnt_off00010ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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