Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0bdb003269a3327…

MALICIOUS

PDF

76.0 KB Created: 2021-03-27 22:56:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 286d27b67c8330e97396e2a3155f26a3 SHA-1: c7211055bc8ae99112cc7bd313221c4683c7305f SHA-256: e0bdb003269a332769be2a2f8e0587e2a859b2e8663d253c8c5fe4a7bba075dc
156 Risk Score

Malware Insights

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

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 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.
  • 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://soxebez.ru/123?utm_term=hills+kitten+wet+food+feeding+guide PDF link annotation
    • http://hackins.site/jawbone_up3_app_2019xih3c.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/domawigabater-bemebesub-wigoki.pdfIn PDF document text
    • https://cdn.sqhk.co/sozovoja/heQTtdd/laraj.pdfIn PDF document text
    • http://domavera.ru/use_of_shall_and_will5i3z5.pdfIn PDF document text
    • https://xadigepuve.weebly.com/uploads/1/3/1/4/131454317/fiwor_fazedudiji.pdfIn PDF document text
    • https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/zutet_tasezazo_rojofewogoba.pdfIn PDF document text
    • http://limecash.xyz/82282818556lcfa2.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/jhheoWK/16314141786.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/8CiPfuW/psious_vr_virtual_reality_for_mental_health.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_02ac4adc508e477daa35c3e6837d77e7.pdf?index=trueIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_801301f7bafa4031b83100648da2e13c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/android_device_manager_android_studio_3._1.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/ayurvedic_plants_information.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/nufuxaralasulu.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_29c5cf24e67c469891bab84ab6e53c7a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/wusesegixowitixesigilazo.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/90811422626.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/31301008293.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF82 4768 bytes
SHA-256: e4e91c000e883c7a0859fe038978452e7bdc173b29518a09d47029df0449446e
font_01_sfnt_off0000efdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 10220 bytes
SHA-256: f10511a0f62095d6618731ea2dfe85857a598a193a18791b4cce49b34b7ce467
font_02_sfnt_off000112d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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