Malicious PDF — malware analysis report

Static analysis result for SHA-256 848e7e61c15f9c7f…

MALICIOUS

PDF

69.2 KB Created: 2021-06-10 05:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: daaa7bfa4b976dbcb491facf26a4d455 SHA-1: 21d0b0f7c2e845835e3d2baaa207475c88941a46 SHA-256: 848e7e61c15f9c7f9b8f230884708e9e7c72d1cd4ba591a01b7fb9d366912b5b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ketchas.ru/pbw?utm_term=among+us+best+mod+menu PDF link annotation
    • https://lekozeva.weebly.com/uploads/1/3/5/9/135964777/vejudolixufi-butubagokuvud.pdfIn PDF document text
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/desixi.pdfIn PDF document text
    • https://dovowufola.weebly.com/uploads/1/3/4/4/134438787/1c1d6a6c5.pdfIn PDF document text
    • https://nasaperexi.weebly.com/uploads/1/3/5/3/135351481/7a13694.pdfIn PDF document text
    • https://gajabalavira.weebly.com/uploads/1/3/5/3/135347595/pufuluza.pdfIn PDF document text
    • https://gatimosuxanad.weebly.com/uploads/1/3/2/8/132814295/pugobagugeredimutige.pdfIn PDF document text
    • https://rujapunilibufig.weebly.com/uploads/1/3/4/7/134713438/5340348.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutopar.pbworks.com/w/file/fetch/144653088/32765836815.pdfIn PDF document text
    • http://xujefix.pbworks.com/f/41710075131.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/w/file/fetch/144528459/kaxovadevuvugob.pdfIn PDF document text
    • http://nagomax.pbworks.com/w/file/fetch/144706314/hafza_teknikleri_ile_ingilizce_kelime_ezberleme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e803985-7cbe-4ee7-a64b-c10b7cabca2a/nunegiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d3cab6-8996-4a14-b002-17cef6d4bf3c/41865155476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/017c07e7-7694-491a-a290-560a78d29c4f/mr_darcy_quotes_from_pride_and_prejudice_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aacf0e31-ae12-4b43-b5f1-70690daadbe8/93079004940.pdfIn PDF document text
    • http://sovamexor.pbworks.com/f/bodenaxedupi.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/f/dragon_city_vampire_dragon_breeding.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/f/how_to_reset_a_bryant_digital_thermostat.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_off0000d371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD371 4936 bytes
SHA-256: 87835969167e49e8c8a847cf7160e39e022a10bc319764bab6df394de0ae5610
font_01_sfnt_off0000e430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE430 10492 bytes
SHA-256: a3b07c16f0b18b9686bdf434ab5a0ba304caf598b00d50ab42c502232cb17c64

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