Malicious PDF — malware analysis report

Static analysis result for SHA-256 174f994b14858b11…

MALICIOUS

PDF

75.9 KB Created: 2021-02-11 22:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 901a994f5f0eabf73c2bd71d3e06c778 SHA-1: ad3ba88d0dc428318c6f6dbd7b96aaea9e0b0528 SHA-256: 174f994b14858b11e40a0f425aa283c78adba92864fa6bf396306be2cb5c2c8f
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 hosted on disposable domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers flagged this PDF as malicious, with the ML model outputting a high probability of maliciousness. The presence of numerous external URIs and a link farm heuristic strongly suggests a phishing or malware distribution attempt.

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://baarspo.ru/123?utm_term=black+dress+for+funeral+girl PDF link annotation
    • https://cdn.sqhk.co/kekazorub/ibZ4Iic/22526900682.pdfIn PDF document text
    • https://memabalizova.weebly.com/uploads/1/3/4/4/134490842/2561726.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/MeJhqgh/91597644284.pdfIn PDF document text
    • https://gotukedefiwukub.weebly.com/uploads/1/3/5/3/135309477/01682944ba4d.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/ghEzhjc/super_s10_launcher_ss_galaxy_s10_launcher.pdfIn PDF document text
    • https://sakavafufegig.weebly.com/uploads/1/3/5/3/135323197/fuvotirezosabokas.pdfIn PDF document text
    • http://mejikisevupepen.iblogger.org/android_studio_toast_message_with_variable.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/bAiijje/57061112039.pdfIn PDF document text
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/fefafitiwaf.pdfIn PDF document text
    • https://cdn.sqhk.co/lanamixese/cjhjfDb/87440145442.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/ghcYYha/xudozozidonip.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/cgiicSl/business_administration_degree_jobs_near_me.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/bitajemisajoz/tamil_yogi_hd_movies_in_2018.pdfIn PDF document text
    • http://nonozud.rf.gd/blueprint_education_computer_answers_class_9.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/glioblastoma_multiforme_cause.pdfIn PDF document text
    • http://visobiwedixupip.rf.gd/carton_a_dessin_tres_grand_format.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_off0000ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 5300 bytes
SHA-256: 93bb62f52a134596f5ef6780f94ad6795548850ad529d89105a757cf1fefedbd
font_01_sfnt_off0000feac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAC 10544 bytes
SHA-256: 0e0c9346e74af74a9f8b232b4bf03671d3e834297cdf22dbc88a101088898872

Open this report in the interactive analyzer, or submit your own file for analysis.