Malicious PDF — malware analysis report

Static analysis result for SHA-256 023c7d1da656d64a…

MALICIOUS

PDF

67.0 KB Created: 2020-12-24 21:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 82cdbbb7a703edc4ed9df0c3c5e08ea9 SHA-1: 096a044b9da6af53961f011aafae56be06aab335 SHA-256: 023c7d1da656d64a833be78a2d009145bcd9d3f9da3c1c6a1586ec6d241bc87d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Roku remote control app not working', suggesting a lure to trick users into clicking malicious links. The presence of a large number of external links, including a link farm, indicates a phishing or SEO poisoning attempt.

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 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.
  • 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://trafftec.ru/strik?utm_term=roku+remote+control+app+not+working PDF link annotation
    • https://cdn.sqhk.co/kibizatududo/aqujeHP/rope_ball_door_stop_grey.pdfIn PDF document text
    • https://lumozilupive.weebly.com/uploads/1/3/4/3/134336046/8911225.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/KBje47t/top_10_gospel_songs_in_nigeria_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/dumadomizore/ihieheA/blend_me_photo_editor_apk.pdfIn PDF document text
    • https://bolumuratojepo.weebly.com/uploads/1/3/4/7/134749128/aed7f.pdfIn PDF document text
    • https://cdn.sqhk.co/dumoniriwo/ie4hggg/sweet_boy_baby_photos_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xolizoxime/0lgekAA/govesobuxetoba.pdfIn PDF document text
    • https://jafumusatezod.weebly.com/uploads/1/3/4/4/134485233/roripajurud-vulozadi-zunatiselufan-fekekewirugiti.pdfIn PDF document text
    • https://cdn.sqhk.co/nugutobudan/1ii2qji/sky_force_anniversary_card_night_camouflage.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/c83e0a39cd4426.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/dorobukasawituw/gemirifipawunerosobimevax.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/rig_veda_in_tamil_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/49528324940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1eb146-6af1-40df-8b68-8873e6c79b2c/spongebob_punnett_square_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/90990853032.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_off0000c9f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F2 5236 bytes
SHA-256: 653982fbed03acac58161f43f603c6bfef00b3a003e9a2bea18d57f862d2c6a1
font_01_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 10340 bytes
SHA-256: d9cc33c5b7217c72113d65231c046176f0817b9290f3b0037de08f80c4394cd1

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