Malicious PDF — malware analysis report

Static analysis result for SHA-256 19da0fe188b06741…

MALICIOUS

PDF

63.2 KB Created: 2020-11-14 17:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: dcd4747ff5832b6a59e7c16932672ddb SHA-1: 5338b1a7df76ee166a42a163ff004389d78af23d SHA-256: 19da0fe188b067416c455d4b7bddf79a39bce2ff311de7cabfa814b0ccc403b9
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirector document. It contains a link farm with numerous external URLs, including one pointing to known malicious redirector infrastructure. The document's structure and embedded links suggest an attempt to manipulate search engine results or direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=pokemon+soul+silver+strategy+guide In PDF document text
    • https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/befobibezuvigonogo.pdfIn PDF document text
    • https://birisudim.weebly.com/uploads/1/3/4/4/134467091/9ee7d76.pdfIn PDF document text
    • https://rubovumalez.weebly.com/uploads/1/3/4/4/134458479/jeniguz-pupapapewinadi.pdfIn PDF document text
    • https://domamulobam.weebly.com/uploads/1/3/4/5/134527142/eb98744d79057a.pdfIn PDF document text
    • https://gabumisuxenumu.weebly.com/uploads/1/3/4/3/134366459/poforabepovuwefo.pdfIn PDF document text
    • https://ramipataxeki.weebly.com/uploads/1/3/4/4/134483057/873b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00376cd8-4ec3-4423-9566-95eb42225a16/sims_4_more_romance_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/the_house_on_mango_street_essay_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/43161265723.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABC6 4208 bytes
SHA-256: a1be04f2a94368c888a61108a694226125d012e452a76eec1580af6f04c0929e
font_01_sfnt_off0000babd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABD 5372 bytes
SHA-256: a53ecfd11bd55f498fbb018299dc0e00d96d5b6e24120e14b1a85d205d022b3e
font_02_sfnt_off0000cd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD00 10536 bytes
SHA-256: 903f150a9f3be7820e0b4fa1f452828bc132624a04f3d15575f063b0695007e6

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