Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a4de66c704eb1a…

MALICIOUS

PDF

71.0 KB Created: 2021-02-16 05:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 793cecb52ef4710ee37fa3746ea58dac SHA-1: 20ecafdb4cd190a93b82ff97b8df65fff4865d3a SHA-256: 14a4de66c704eb1a58037a02a25b4e1130a61b40d97121732fff68b72b361372
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics and an ML classifier, 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 phishing operation. While no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest it may leverage embedded JavaScript or exploit PDF vulnerabilities to redirect users to malicious sites.

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://druttle.ru/123?utm_term=vietnamese+guerrilla+warfare PDF link annotation
    • https://kuwomodelinero.weebly.com/uploads/1/3/0/7/130776449/vigokufosode.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/jepibeg-nobojurakix-sevojapewema-gilaj.pdfIn PDF document text
    • https://jorobeperepi.weebly.com/uploads/1/3/1/8/131856290/232638.pdfIn PDF document text
    • https://putidano.weebly.com/uploads/1/3/4/3/134388569/zeledakikaxodo.pdfIn PDF document text
    • https://buputulu.weebly.com/uploads/1/3/0/7/130738697/rebibevosid.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/fudedobagapamotiw.pdfIn PDF document text
    • https://wivilunox.weebly.com/uploads/1/3/1/4/131453894/vutina.pdfIn PDF document text
    • http://jolujunutido.iblogger.org/ibps_crp_po_admit_card_2018.pdfIn PDF document text
    • https://medimigo.weebly.com/uploads/1/3/4/8/134864966/2305869725.pdfIn PDF document text
    • https://wapofaxuza.weebly.com/uploads/1/3/5/9/135992917/wegidadukutomap.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/lininuxifemejogoj.pdfIn PDF document text
    • https://doxazefeseremef.weebly.com/uploads/1/3/4/7/134764644/lakizemulirugevef.pdfIn PDF document text
    • http://misiliv.66ghz.com/sotowufotazesomulofo.pdfIn PDF document text
    • https://dovoviwum.weebly.com/uploads/1/3/0/7/130776035/3249323.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/jobavo/ssc_stenographer_2018_answer_key_date.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/south_africa_performance_at_calabar_carnival_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/albumina_definicion.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD961 5144 bytes
SHA-256: ddaddd8584df416fa17cb02e6d500c06b26d6e84d0f174147cbaadfb5d164f2a
font_01_sfnt_off0000eae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE2 10596 bytes
SHA-256: d0b37eef1343e6aaf20bffacc9e20cb518ea48decc67e262ef8517de86a138be

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