Malicious PDF — malware analysis report

Static analysis result for SHA-256 948053490067014a…

MALICIOUS

PDF

72.7 KB Created: 2021-01-27 16:50:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3d5c761cb10303f96971313dab0a27c4 SHA-1: eb6aa382fd1c08843a77740364f51fe895b46a09 SHA-256: 948053490067014a802af0aa3b8977cd0ac33e7bbe5e9b6909caf3bb4b9c82eb
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links, further supporting malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/123?utm_term=sylvania+dvd+player+manual PDF link annotation
    • http://mysteps.online/85074476015p5zcw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5fe4ad7229764.pdfIn PDF document text
    • http://mantenancie.com/catcher_in_the_ryes0ac4.pdfIn PDF document text
    • http://lovelid.xyz/laser_quest_prices_mississaugab540z.pdfIn PDF document text
    • http://findssldz.xyz/principales_causas_del_cambio_climaticov2vbp.pdfIn PDF document text
    • http://megalit-korolev.ru/57755932871r9nc2.pdfIn PDF document text
    • http://weareanonymous.org/130669162086fb18.pdfIn PDF document text
    • http://bostpolamos.site/24165421119ab7gs.pdfIn PDF document text
    • http://apparentlyopt.com/buponijijopedofaselokudovucz6.pdfIn PDF document text
    • http://lomags.ru/wawubasiteribopus0p.pdfIn PDF document text
    • http://sallles.ru/killer_instinct_ripper_415_owners_manualij4gq.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/lorugipopuxe/baby_looney_tunes_baby_shower_invitation_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/89756150738.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/23061071183.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_off0000dd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 5192 bytes
SHA-256: fa9eb352001cfd1673cadd3ad1f075770407080616a3c6ddbb0e853d03b33987
font_01_sfnt_off0000eefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFB 12224 bytes
SHA-256: bd9a0500c7b5f0a82737dec96ea2974bc093ffb7b7521c5a8f54261d73f860ee

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