Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfc57822f139bd9…

MALICIOUS

PDF

72.0 KB Created: 2021-03-18 10:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: fc5e6ce17942eda457f039e1dfaf7b1e SHA-1: 9a347e4d6f76181844ff02cb4af9b52380be0274 SHA-256: fbfc57822f139bd9e91b6efd3fd490f87e04de24064e6dc32ec2f97fb44d3f28
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting and potentially malicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL and the document's apparent purpose of directing users to external content align with a phishing or malware distribution attack pattern.

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://gimoguvi.ru/wix?keyword=300+miles+to+pigsland+code PDF link annotation
    • https://cdn.sqhk.co/wadupaxi/dAqCBie/17982061858.pdfIn PDF document text
    • http://mavpa.fun/harford_county_sheriff_reportsus38q.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/4hjigZf/duroxokifexuzasazuvob.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/t9jjhjo/free_printable_word_search_puzzles_for_adults.pdfIn PDF document text
    • https://gejixivipoza.weebly.com/uploads/1/3/0/9/130969358/tamum.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/hbhjgfH/zivilakuzijemitajot.pdfIn PDF document text
    • http://axecheat8.xyz/24196873424d8ebs.pdfIn PDF document text
    • http://oblakova.ru/79948783588omzhm.pdfIn PDF document text
    • http://presente-top.store/pevopesulozovobbb7.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/hhje9jb/lejez.pdfIn PDF document text
    • http://discovljzg.fun/keponazagefaga816rt.pdfIn PDF document text
    • http://affilateapp.online/matthew_hussey_should_i_text_him_firstkdt4n.pdfIn PDF document text
    • https://sibetufubexab.weebly.com/uploads/1/3/2/7/132712005/tapakozadaj.pdfIn PDF document text
    • https://xivetebutago.weebly.com/uploads/1/3/4/7/134737957/bunilizotenur.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/046061a4-cbf8-4115-8209-989ea33b9509/ratofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de9017b-889e-4e0a-bd26-ea5c6a7fa802/journey_to_the_center_of_the_earth_3d_filmyzilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/224b7f2b-dd0d-4f24-8a8c-abc7687a5716/32069959212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1160861-f3fa-4fad-8950-5d2c066353e2/89002782980.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 5508 bytes
SHA-256: 0c26cee0cdb15a4bde21ae70119b7b3b322a53ba188e2325265ace6149c73ea3
font_01_sfnt_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 10716 bytes
SHA-256: 640c8659de702e0d790406d0b7021339e7e599100448febc1c60f368532d3837

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