Malicious PDF — malware analysis report

Static analysis result for SHA-256 84645e74d1f4a125…

MALICIOUS

PDF

74.7 KB Created: 2021-02-24 18:43:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 30d2667d5d1c688f0946ac9b5007a8b5 SHA-1: 2bb878a584b6992c9049f9c1e80f25d023dc47d1 SHA-256: 84645e74d1f4a1256d5b8db35a0c7c0e416f60c6951a809f04dd634e66732fa6
126 Risk Score

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 0.9998

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://maypoin.ru/strik?utm_term=how+to+get+rid+of+old+acne+spots PDF link annotation
    • https://cdn.sqhk.co/duxadikoti/egijjuA/48356754986.pdfIn PDF document text
    • https://cdn.sqhk.co/lemisobe/SdifhdW/lebasivurezidi.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/tactics_by_gregory_koukl_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/yjbichc/8_ball_pool_long_line_hack_ios_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/2Shcqge/musujivuxalo.pdfIn PDF document text
    • https://cdn.sqhk.co/jipuxoxukul/hbJhgic/bexodefinedevenezofuzow.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/euRifjg/best_motorcycle_racing_games_for_pc_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/pabopimi/koif2lO/cat_and_bird_cage_picture.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/jdjgj5l/war_commander_battle_tower_defence_games_unblocked.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/34994592242.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/viwoxuz/game_dev_tycoon_guide_wikia.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/bumowobuvam.pdfIn PDF document text
    • http://najufijipavavot.rf.gd/xemuzoxoma.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/96115089877.pdfIn PDF document text
    • http://jolasesiv.epizy.com/tonixoxazuduvufebukeponis.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/pivewujekigomopesokiviru.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/dukagozopujusezudolafud.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_off0000e713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE713 5376 bytes
SHA-256: 32bd443421e7728577d2d5400d4913b362777af06d725f89c15d9708aa123cee
font_01_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 10704 bytes
SHA-256: 285a832423ad8761374137bd3a8b5a6877c654648cc350a13252710512e4f06a