Malicious PDF — malware analysis report

Static analysis result for SHA-256 f199bc9bf3b9430a…

MALICIOUS

PDF

84.0 KB Created: 2021-03-21 23:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0756dc07443b76f91a47e3e13202b714 SHA-1: 2d211dc834285c082bbe7d0a2ee2db2465d50227 SHA-256: f199bc9bf3b9430a24cc53b7d728a667ec58859940fec0b0f18be8ee08fcfca0
104 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with one prominent link pointing to 'lozipotod.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO abuse. The 'ML_NYX_PDF_MALICIOUS' heuristic strongly suggests malicious intent. The document body, though heavily obfuscated, contains text related to fantasy football queries, likely serving as a lure to encourage clicks on the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/wix?keyword=what+time+do+waivers+clear+on+yahoo+fantasy+football+2019
    • https://cdn-cms.f-static.net/uploads/4413573/normal_601ff7509a01e.pdf
    • https://cdn.sqhk.co/poronujefino/kbphgMp/fairy_tail_high_school_au_fanfiction.pdf
    • https://cdn.sqhk.co/kulizuxekume/xvq3iiG/zijodejadasejezukupidixu.pdf
    • https://zerivomixiloz.weebly.com/uploads/1/3/4/6/134664353/nanesexudaliv.pdf
    • https://zipufalazuviw.weebly.com/uploads/1/3/1/8/131856517/nesiwobote_zenukenupisaz.pdf
    • https://cdn-cms.f-static.net/uploads/4392439/normal_60154c074f117.pdf
    • https://cdn.sqhk.co/felebamifuk/JXmcRge/56968710592.pdf
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/vopometap.pdf
    • https://netajowazowu.weebly.com/uploads/1/3/4/3/134325029/bozoregunubagu-noruxewaroz-lezulubuwoba-penaxazute.pdf
    • https://cdn.sqhk.co/levowexesu/3ihIBfK/overkill_3_apk_obb.pdf
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5ffaaba8592ae.pdf
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdf
    • https://romidawuro.weebly.com/uploads/1/3/2/7/132712233/24c1f4.pdf
    • https://static.s123-cdn-static.com/uploads/4495240/normal_5fc664def1680.pdf
    • https://cdn.sqhk.co/nanagajog/4Nhf3qz/outlook_2007_ing_old_emails.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zunaporam/55605215116.pdf
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_6e9e85a8f4b244c28f492a2ad53b3ae3.pdf?index=true
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_82fb9dba93b74c908990013e1e8691f1.pdf?index=true
    • https://s3.amazonaws.com/tufitijinexu/microsoft_games_live_for_windows_10.pdf
    • https://s3.amazonaws.com/remavuj/23155604536.pdf
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_492674c57a6d4803a2fe6b1276d5256b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001072f.bin
add3a3975b4674249a77748d0a857a1413815b82b3a89d7f7555ffb8cf334d97
pdf-font-stream PDF embedded font (sfnt) at offset 0x1072F 6148 bytes
font_01_sfnt_off00011c14.bin
1029ab040b249d6b3f8d0243ba72a8e2aa580c3acfaf1b71a9b1698d7fca3ceb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C14 11184 bytes