Malicious PDF — malware analysis report

Static analysis result for SHA-256 9950eae467d38b71…

MALICIOUS

PDF

68.4 KB Created: 2021-02-21 06:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 269b7a1166ade1a58e227f7b6d2a8d48 SHA-1: fd281b80ee9d282e02bd1faf0fdfc507b3db3a64 SHA-256: 9950eae467d38b71dcdd940d7c1c21aa4054d08c0da4d7c1a909d7d9e3b827e0
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters suggests tracking or obfuscation for phishing or malware delivery.

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://baarspo.ru/strik?utm_term=rock+candy+mini+wired+controller+for+xbox+one PDF link annotation
    • http://ridunculus.com/brawl_stars_mod_apk_hackbh3n9.pdfIn PDF document text
    • http://air-calm2.club/kfc_job_application_form_online_apply_now4chp2.pdfIn PDF document text
    • http://kurs1.xyz/zokubovunu1s1vo.pdfIn PDF document text
    • http://tuworiki.22web.org/tituwagajuj.pdfIn PDF document text
    • http://cadenalia.com/prayer_for_your_godchildgerex.pdfIn PDF document text
    • https://cdn.sqhk.co/ratevusur/ojdihvV/xotuxolegipikelezo.pdfIn PDF document text
    • http://bionatur.space/phlegm_colour_guideaj1cf.pdfIn PDF document text
    • http://rmk4sale.xyz/gunship_battle_helicopter_mod_apk_latestwb60a.pdfIn PDF document text
    • http://arfeshome.com/horntail_boss_guidevutff.pdfIn PDF document text
    • https://mizewipexu.weebly.com/uploads/1/3/4/6/134609608/50e6e9086.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/9202071470h884a.pdfIn PDF document text
    • http://gifozuxozud.22web.org/biremitatebonuzal.pdfIn PDF document text
    • http://winclean-shop.space/troubleshooting_ge_chest_freezer9sa7c.pdfIn PDF document text
    • http://onenature.space/princess_robot_bubblegum_car1e8zx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bimuvugibane.rf.gd/assassin_s_creed_revelations_skidrow_crack.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_off0000ced1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED1 5464 bytes
SHA-256: ca21b7b2cc4752731c331314715a463640c4a2893228cce34ded0a9fd188cf75
font_01_sfnt_off0000e17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17B 10376 bytes
SHA-256: 989077067f935b19b325d56c692a46a0d5d33ee096127c09f0793a39bff074fe

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