Malicious PDF — malware analysis report

Static analysis result for SHA-256 9986bffb8f067839…

MALICIOUS

PDF

79.1 KB Created: 2021-02-23 12:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: aee83f61643353ef871e79cb7d14dd92 SHA-1: e0053dcc2732e43b6ececa49bccabe8339578511 SHA-256: 9986bffb8f06783958b4d3173fd3385d90223a4f100185addd40600851805b07
146 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious phishing content. It contains a large number of embedded links, many pointing to disposable domains, designed to act as a link farm. The document body, though heavily obfuscated, appears to be a lure related to 'gsm intercom' services, suggesting a targeted phishing attempt. The presence of external URIs and the link farm structure strongly indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://jottigo.ru/strik?utm_term=best+sim+card+for+gsm+intercom PDF link annotation
    • https://seritixatot.weebly.com/uploads/1/3/1/0/131070849/5412112.pdfIn PDF document text
    • http://cheapkeys.site/8380745545394pb1.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/nofuturel8gt59.pdfIn PDF document text
    • http://ovca.space/target_shabby_chic_bedding_sheetsethf9.pdfIn PDF document text
    • http://craftsmansmetics.com/zigiburudifirato6jwc.pdfIn PDF document text
    • http://yognat.space/26955852711hbts0.pdfIn PDF document text
    • https://lesavamu.weebly.com/uploads/1/3/5/3/135347369/liwufuvewekuwo.pdfIn PDF document text
    • http://winemewimivo.22web.org/free_printable_templates_for_checkbook_register.pdfIn PDF document text
    • http://milky-rp.space/186163017028g9zk.pdfIn PDF document text
    • http://kino-vezde.ru/49496446518d1iq7.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/vitelitubovuluj/xusidonivodaku.pdfIn PDF document text
    • http://jifusewu.epizy.com/nugekudunazewodunofunezib.pdfIn PDF document text
    • http://tofedig.epizy.com/today_s_assam_tribune_newspaper.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/zadev.pdfIn PDF document text
    • http://bufolezipozazom.epizy.com/jagujebibomijaxilupuzowe.pdfIn PDF document text
    • http://nudifezidezi.rf.gd/army_commando_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/29931309780.pdfIn PDF document text
    • http://vokunewegulu.epizy.com/ararara_marathi_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/adagio_for_strings_tiesto.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF773 5360 bytes
SHA-256: cd6fa274ab3df0a9280c712bdbe1eb1d8a85a8d07516c49d39b48739afef4f28
font_01_sfnt_off00010999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10999 10876 bytes
SHA-256: 68a38dc4d059e4c1bb3401dfcd3cc94108f95ed31cc75adcdc128b8cb230866e

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