Malicious PDF — malware analysis report

Static analysis result for SHA-256 23dbdbc8460615d6…

MALICIOUS

PDF

75.1 KB Created: 2021-03-02 17:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0729bc16c34607b6a96d43d3967276af SHA-1: b11235eff680d086aa36ef82f7683cb504908215 SHA-256: 23dbdbc8460615d6fd3319f3f6467b567d0b987ab34c2dcd8761b8fdb06e3932
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jacksth.ru/strik?utm_term=pioneer+mixtrax+fh-x700bt+set+clock PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fd18cb8dbee3.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/eTY1ijY/samsung_phone_grand_prime_plus_price_in_bangladesh.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/what_happens_in_the_throne_of_fire.pdfIn PDF document text
    • http://wixosefimaba.scienceontheweb.net/86875737233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_60194ad670255.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/5geQNX2/sniper_zombie_assassin_3d_unlimited_diamonds.pdfIn PDF document text
    • https://cdn.sqhk.co/ninafoso/ggcK9ic/joker_ringtone_lai_lai_lai_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/iejhkMX/19521057828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_60044c9dca2db.pdfIn PDF document text
    • https://cdn.sqhk.co/ninoporaleva/yLYhhe0/tusidofaporogod.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/UZKuhgh/poparif.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/kiwuka.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/jHfaVjb/66174037082.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/eyCZxig/police_car_siren_sound_mp3_download_djpunjab.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/hhjheI2/xamup.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/58421891285.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/iRjfgVd/jasumamivutupuxavop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_6038b50b83d0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mukanebesiva.atwebpages.com/8516985864.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/amazon_forest_fire_video.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/4964919268.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/paiya_tamil_movie_free.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_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 5648 bytes
SHA-256: 01462f36348f03d2c7594b16f8025bc06520d58def415c9736868c3de012d5ff
font_01_sfnt_off0000f8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 11176 bytes
SHA-256: da286260ed1e48a33ac3395e3f0e545a3d2a7213e2661b6f5e28f636775b0e72

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