Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f527f2bc759e86…

MALICIOUS

PDF

91.7 KB Created: 2021-02-20 16:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2756a40810762ab6f49a833f06c80bce SHA-1: 807d3e3574c4191991b29e1c6b817dbe50904ffe SHA-256: 13f527f2bc759e86f63a0e544a9a97ef3fb2cf261173389c8daceb1f13d2731b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely for phishing or malware distribution. The embedded URLs point to suspicious domains, further supporting this assessment. No scripts were extracted, but the overall structure and URL findings point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/aws?utm_term=baldur%2527s+gate+dark+alliance+ii+steam PDF link annotation
    • https://cdn.sqhk.co/zotofoza/hKShage/18326175990.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/jjfkget/3868416311.pdfIn PDF document text
    • https://cdn.sqhk.co/rosomugimo/XvGmWX3/13680211870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485801/normal_601980159a956.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/cBgY8jd/ice_cream_van_simulator_script.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_6030851cad7d1.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/ribR4hh/dr_phil_soundboard_download.pdfIn PDF document text
    • http://goduvide.22web.org/butalbital_acetaminophen_caffeine_davis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366620/normal_6009695116160.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/JAgjgkl/800_words_season_1_episode_6.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/eQhdtha/brain_training_exercises_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/geiigco/vetepaxitukajupuzugibade.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/cjagf9K/wsdot_cameras_snoqualmie_pass.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/ifIidhh/kodiak_alaska_weather_november.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/ifiajc4/telifivepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_60125a17bcfaf.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/7PVggpN/parrot_wallpaper_hd_4k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nonulalomijowo.epizy.com/powerarchiver_2004_free.pdfIn PDF document text
    • http://mutunibe.rf.gd/ragipaxexem.pdfIn PDF document text
    • http://wometopususap.rf.gd/uti_pan_biometric_authentication_software.pdfIn PDF document text
    • http://fopekexu.epizy.com/85154902449.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_off00012715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12715 5408 bytes
SHA-256: f5dfd474dc5352b5af55b1fe32921d5ff14223047db65022594d8b45f58a5169
font_01_sfnt_off0001396d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396D 11724 bytes
SHA-256: 7ab1a229ff56797f61277bf197d156772f06a01526dff7a9e0fc13430febc1bd

Open this report in the interactive analyzer, or submit your own file for analysis.