Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ae4e5ace399d66…

MALICIOUS

PDF

66.3 KB Created: 2021-03-25 17:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9860e1cb85f259dc9b73cfc722f4a7ed SHA-1: 61645610ab4e250de0c1b5dbf8d1d2dcf0d73820 SHA-256: 98ae4e5ace399d666579295bcf66716eea516495c1592a1af6b623c741fd2d64
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a 'Download' button heuristic further supports the idea that the document is designed to trick users into clicking through to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/wix?keyword=abate+of+florida+forms
    • https://cdn.sqhk.co/xubuzivo/QUghhZJ/xemozaxunawuwole.pdf
    • https://nitesefoxon.weebly.com/uploads/1/3/1/4/131453907/lugazizamolete.pdf
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/659086.pdf
    • https://lapebezufidasaz.weebly.com/uploads/1/3/4/3/134316617/4643218.pdf
    • http://pasipodo.mypressonline.com/4478277942.pdf
    • https://fulotetaputu.weebly.com/uploads/1/3/2/7/132740707/c2a693568ba.pdf
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/xejisilekov.pdf
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/9506429.pdf
    • https://madafodem.weebly.com/uploads/1/3/5/3/135397102/5109432.pdf
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/fexizosixubuman.pdf
    • https://burigazipe.weebly.com/uploads/1/3/4/7/134764527/belelawaxumavuge.pdf
    • https://cdn.sqhk.co/kakapoxavu/PjipPji/tomb_of_the_mask_level_144.pdf
    • https://folutiniku.weebly.com/uploads/1/3/1/8/131871586/4a196734c5747fd.pdf
    • https://pudevezogezuk.weebly.com/uploads/1/3/4/5/134528534/05d1baf.pdf
    • http://zosuwalerikare.getenjoyment.net/blanchard_and_fischer_lectures_on_macroeconomics.pdf
    • https://cdn.sqhk.co/bitaxukezor/9Thdric/baseball_9_innings_2011.pdf
    • https://cdn.sqhk.co/fulaxanew/iik8haI/sea_monster_city_cheat_apk.pdf
    • https://bixagitiwor.weebly.com/uploads/1/3/4/6/134618264/runowobenisagitipe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e6f029b6-66a4-4d49-9f90-0f0eb05bcfeb/dagobi.pdf
    • https://uploads.strikinglycdn.com/files/cba513ec-2e0b-4251-8f53-2dc718536e0e/84935453299.pdf
    • https://uploads.strikinglycdn.com/files/c4e5d933-c29f-4078-ae5a-2fe17fde580d/zagg_keyboard_ipad_pro_not_connecting.pdf
    • 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_off0000c635.bin
aa1d65d904527a3763c5266290d1de57f01c24c51a4c4b61221272c852b6058f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC635 5184 bytes
font_01_sfnt_off0000d7bd.bin
e5f257b78320a9fa1dbc33c40c6f9cfe9303b634536472083b3e971552919016		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 10684 bytes

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