Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa1867b92f498f8…

MALICIOUS

PDF

92.0 KB Created: 2021-02-08 06:54:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6617dadd5ee4506c85bd1441b6eec6b5 SHA-1: 474410ecbe46333595e0eaf0a38413f5c941dd44 SHA-256: daa1867b92f498f8e47ce613a70e3b8254d0bbc16cdf38545c335f9c0e90b481
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and the nature of the links indicate a potential for malicious redirection or content delivery.

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://leonvi.ru/aws?utm_term=donkey+kong+country+returns+wii+guide PDF link annotation
    • https://vakogiguwowokel.weebly.com/uploads/1/3/0/7/130775334/7f57f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415526/normal_5ffd49fb34a32.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/67b8148.pdfIn PDF document text
    • https://ligexuvuzi.weebly.com/uploads/1/3/0/8/130814340/sumisu.pdfIn PDF document text
    • https://pigaxapi.weebly.com/uploads/1/3/2/8/132815084/sewiwo.pdfIn PDF document text
    • https://dafebifu.weebly.com/uploads/1/3/4/3/134399244/8122295.pdfIn PDF document text
    • http://hdvideo.design/gepofudunuzetozawxcww.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460055/normal_5fdf9ed19805e.pdfIn PDF document text
    • https://rababavuve.weebly.com/uploads/1/3/1/8/131871532/reririk.pdfIn PDF document text
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/527064c0038.pdfIn PDF document text
    • https://xiwikufebalub.weebly.com/uploads/1/3/1/4/131438050/5605879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_60100e42a3310.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/lutatazefuf_mepole_padakaxateta_bogifif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418584/normal_5fd0980678c06.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/jieghjV/xumipemukelokugeg.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/lRhihgR/lion_vs_dinosaur_animal_simulator_games_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5fda12b3d1647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_5fd1fd04a1e33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00012bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAC 5124 bytes
SHA-256: e2220be9ef9d882fa23d703d7482c8c0b181880c20bfea6060d68acf17ef9d61
font_01_sfnt_off00013d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D56 11100 bytes
SHA-256: 6f1b0e9b2d8e0dd76c2566d5953d82447037eed7f4191cbd8d7c2ff29fb069eb

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