Malicious PDF — malware analysis report

Static analysis result for SHA-256 63abd7914d86530c…

MALICIOUS

PDF

69.4 KB Created: 2021-02-22 11:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9746fdbf29b3933b664fc47cc821f996 SHA-1: f2ba7a5c3dd24fbea650eb1016469e3a02bb85d1 SHA-256: 63abd7914d86530c96a827ca85d675ade86205cd3c23a2a8089bb02ece91ddd3
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful content.

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://jottigo.ru/strik?utm_term=what+is+the+salary+of+hvac+design+engineer+in+india PDF link annotation
    • http://dihtyar.online/vectors_phet_lab_answersoes6r.pdfIn PDF document text
    • https://zejasuvosoropaj.weebly.com/uploads/1/3/5/3/135345482/dozodubal.pdfIn PDF document text
    • https://rivatuvimib.weebly.com/uploads/1/3/4/4/134469475/siwinapexo_bumisisov_pixukisu.pdfIn PDF document text
    • https://volifutizur.weebly.com/uploads/1/3/4/6/134602954/mozowo.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/hjnjdhc/pocket_option_minimum_deposit.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/theOhcC/heart_rate_monitor_for_peloton_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/tupuxinekowa/ggcgiia/wobawosagakidegifapi.pdfIn PDF document text
    • http://indital.space/anthony_de_mello_awarenesspuylu.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/jjejbM8/webtoon_unordinary_episode_179.pdfIn PDF document text
    • http://blablablacar.online/fetipoah4l2.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/jcJjggd/lenuloz.pdfIn PDF document text
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/bae7b98d87b7444.pdfIn PDF document text
    • https://fagugirawax.weebly.com/uploads/1/3/4/3/134388021/tezapote.pdfIn PDF document text
    • http://frukt.fun/parks_and_recreation_streaming_saisouhuog.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/bawalidamovidud/mafepuved.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/temixuriboxisobupurez.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/29543977836.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/53398424649.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD39 5456 bytes
SHA-256: f148153c1953094b5d08cbcd169e30474b4d21aacab6f4d8386f7792d2f48f1f
font_01_sfnt_off0000cfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDE 10224 bytes
SHA-256: fb088f80330bea97bac8bf7f8cc8d06bae8535d80b423e30206def6a4cf455d0
font_02_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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