Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c1c0d9fb950119…

MALICIOUS

PDF

75.5 KB Created: 2021-05-13 16:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 9a719f3ae1fb6e0aaf83b3ff8ffcf182 SHA-1: 02b1091928c789d774ccf82790caa7b69816fd7e SHA-256: 54c1c0d9fb95011947051c2248fc0c270bac51509511f9b1d59a1e13e19f322f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with one prominent URL suggesting a lure related to public speaking. The presence of external URIs and the overall structure indicate an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=how+to+start+an+introduction+speech+about+yourself PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368969/normal_5ff898cf9a3c8.pdfIn PDF document text
    • https://cdn.sqhk.co/vegupujed/tgdihhf/noribovekigikibu.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_60547ac92da3e.pdfIn PDF document text
    • http://firstdoctor.xyz/lisijagexowoxowawafozidoi9usy.pdfIn PDF document text
    • https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/ludozaguxe-jesukox-lemupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417032/normal_6041ccc531036.pdfIn PDF document text
    • http://123dutch.com/yamaha_rx-a700_manualjnjih.pdfIn PDF document text
    • http://milanbeachs.space/kiloralitfstje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416496/normal_6015380a6762a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388163/normal_5fc834b646401.pdfIn PDF document text
    • https://mizilugodipibo.weebly.com/uploads/1/3/0/8/130813887/penuvadisewo.pdfIn PDF document text
    • https://gilepinewuje.weebly.com/uploads/1/3/4/0/134096317/nalerob_nezakamus_dapides.pdfIn PDF document text
    • http://leadtop.co/what_are_stylistic_choices_in_filmpakfc.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/ixzig0a/xugaxixiwelaz.pdfIn PDF document text
    • https://wusiparopebabo.weebly.com/uploads/1/3/4/5/134505529/livos.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/g6Kp9Si/44343414832.pdfIn PDF document text
    • http://atomyimperial.ru/768332990564djk1.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/88OZm0A/xanoko.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/Gb4icjj/sisters_hospital_visiting_hours.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/912532b9-206b-4b68-96b7-8341c2c6159d/vidaxidolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dfda6d4-deae-4c33-b3ba-28e827b68c94/timegubupolafewafemuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f588b4-640a-4cda-8857-cd1f9eee16a6/masoliripud.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_off0000e64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64C 5540 bytes
SHA-256: f058d5eafdd2e64a37c629a1e6fb44a7de2dcdc9e5210fb007be7d954d8af90d
font_01_sfnt_off0000f92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 11960 bytes
SHA-256: 5a3cfba3cbcf2579f9d589164415824a89e352fdb479e75aa5b9426349b45471

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