Malicious PDF — malware analysis report

Static analysis result for SHA-256 13def97f62f681f3…

MALICIOUS

PDF

78.4 KB Created: 2021-02-14 15:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1ed2f766642ec38206a3e3482d6ec0dc SHA-1: 9c8fd311b160d59daaa027bb147dc408a6058355 SHA-256: 13def97f62f681f30af3acb452422ead8323ac1cb4ca802e613d4c1e08217bbd
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and a link farm on disposable hosting, strongly indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection confirm its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/123?utm_term=download+game+killer+apkpure PDF link annotation
    • http://silvanozito.online/vunabimerizijed3re9z.pdfIn PDF document text
    • http://magazinrf.xyz/topographical_survey_reportmv1b9.pdfIn PDF document text
    • http://trixy-matrix.space/3619501963324r0l.pdfIn PDF document text
    • https://furetexagorude.weebly.com/uploads/1/3/5/9/135958868/wiboxuvatizemap.pdfIn PDF document text
    • https://jiwebatije.weebly.com/uploads/1/3/3/9/133997557/7305321.pdfIn PDF document text
    • https://barefofu.weebly.com/uploads/1/3/4/4/134492989/lodamipu.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/6422824.pdfIn PDF document text
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/xiwazol-bizemozog-botas.pdfIn PDF document text
    • http://nickned.me/dipuwunatalusiposoxtjdu9.pdfIn PDF document text
    • http://hopecommunitynaz.com/bare_knuckle_boxing_bookhll68.pdfIn PDF document text
    • https://cdn.sqhk.co/motuwezelu/jaghhag/vatur.pdfIn PDF document text
    • https://wawotisusuwo.weebly.com/uploads/1/3/2/7/132741293/mewolaxugotad.pdfIn PDF document text
    • http://teaitalis.space/nujidohbnzm.pdfIn PDF document text
    • https://morapunepa.weebly.com/uploads/1/3/1/6/131606469/lujeseresuwovo_befojirupimab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/ap_eamcet_allotment_order_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/kuremipexuzedesap.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/pamuxixibutogadasobibu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF42 5256 bytes
SHA-256: cfe25da9f30db8eee4467c9f6b9e4870a64182f08daa140f5a386c611ca62013
font_01_sfnt_off0000f12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12A 11532 bytes
SHA-256: d4745274b5eb4e123bb12b5a2bfc5de1a3cfbac36e009b126a362c8d3e1d8cd3
font_02_sfnt_off000117a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A5 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2

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