Malicious PDF — malware analysis report

Static analysis result for SHA-256 980b06cb0a897e41…

MALICIOUS

PDF

75.3 KB Created: 2021-01-21 12:29:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c53222e48fbf102ffc76b58edef1b925 SHA-1: e657920dcef902dcd910276994c28682b0dbf3cc SHA-256: 980b06cb0a897e4141444108b2bebf9221e22556b91a39c674f39268a4bb7f1e
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs that lead to sites hosting cracked software, indicating a phishing or malware distribution attempt. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM and ML_NYX_PDF_MALICIOUS firings, along with the ClamAV detection, strongly suggest malicious intent. The document body, though heavily obfuscated, contains references to 'autocad 2016 32 bit crack utorrent', aligning with the observed URLs.

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://trafficel.ru/aws?utm_term=autocad+2016+32+bit+crack++utorrent PDF link annotation
    • http://selolaz.66ghz.com/50357233802.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/jmigggK/dr_driving_game_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480142/normal_6000779100fa0.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/xopibuza.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/ipLidjb/sonojukijanumi.pdfIn PDF document text
    • https://site-1172884.mozfiles.com/files/1172884/puzzle_bobble_mame_rom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_6004335f4b9e9.pdfIn PDF document text
    • https://site-1175310.mozfiles.com/files/1175310/zivasogigix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474750/normal_6008a9fd68bee.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/GihghXs/adventure_landing_water_park_jax_fl.pdfIn PDF document text
    • https://site-1176160.mozfiles.com/files/1176160/spinach_salad_recipes_easy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xadamun.epizy.com/arya_2_songs_free_in_malayalam.pdfIn PDF document text
    • http://palipesokugukux.epizy.com/zunupukivomuwovu.pdfIn PDF document text
    • http://sirusuve.epizy.com/apowersoft_android_recorder.pdfIn PDF document text
    • http://puwojewemuxa.epizy.com/baghban_all_song_video.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_off0000e783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE783 5560 bytes
SHA-256: 830f09a96ede49c93fb194d688b476aa87ca346eaf1e015944588ad5b83794e5
font_01_sfnt_off0000fa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7E 11016 bytes
SHA-256: 443d01fe1b9cf2d57fa29ca97bb860d0ec5e5d74551fc17cad9119913c43bf19

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