Malicious PDF — malware analysis report

Static analysis result for SHA-256 5895b54b678c88c9…

MALICIOUS

PDF

99.2 KB Created: 2021-03-01 04:56:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 89aa89d9b3d636c35a258c848cf9ab36 SHA-1: 9ae8dbfa523b5136f432a304f2d69ca8d4db042a SHA-256: 5895b54b678c88c93af79394ff3bc3cc2513d298a5912e82c729d89456a4e6b4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://maypoin.ru/123?utm_term=coleman+5500+generator+price PDF link annotation
    • https://kiwakamumosa.weebly.com/uploads/1/3/5/9/135963193/d94d3398437.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/igkjfNh/jomivakutogitedu.pdfIn PDF document text
    • https://fixasamajiwige.weebly.com/uploads/1/3/4/3/134318971/1e0d72b5.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/jakAjfe/photo_collage_maker_iphone_free.pdfIn PDF document text
    • http://fuzuxozexuvir.22web.org/54303841906.pdfIn PDF document text
    • https://birupilanakok.weebly.com/uploads/1/3/4/0/134017156/a011ebd9812.pdfIn PDF document text
    • http://xuxazefovudiwe.iblogger.org/domain_driven_design_book.pdfIn PDF document text
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/mugapobanoveduza.pdfIn PDF document text
    • http://pr-bux.online/6074325588323749.pdfIn PDF document text
    • http://fepotarugagi.22web.org/acronis_backup_12._5_advanced_user_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/BAjgEuw/traffic_rider_highway_race.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/fHZibCz/79582066463.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/5981950.pdfIn PDF document text
    • http:///\\\/twitter.com\\\/PowerEquipment\,\icon\:\icon-twitter\,\title\:\Twitter\},\Pinterest\:{\href\:\http:///\\\/pinterest.com\\\/powerequipment\\\/\,\icon\:\icon-pinterest\,\title\:\Pinterest\},\YouTube\In PDF document text
    • http:///\\\/www.youtube.com\\\/PowerEquipmentDirect\,\icon\:\icon-youtube\,\title\:\YouTube\},\Instagram\:{\href\:\https:\\\/\\\/www.instagram.com\\\/powerequipmentdirect\\\/\,\icon\:\icon-instagram\,\title\:\Instagram\},\LinkedIn\:{\href\:\https:\\\/\\\/www.linkedin.com\\\/company\\\/power-equipment-In PDF document text
    • http:///\/www.bbb.org\/chicago\/business-reviews\/industrial-equipment-and-supplies\/power-equipment-direct-in-bolingbrook-il-57001088,title:PowerIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/admin_template_bootstrap_4_with_datatable.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/nasejebanapezalifib.pdfIn PDF document text
    • http://jilovin.epizy.com/xidakusit.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_off00011c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1F 12328 bytes
SHA-256: 8d60e608c05a386f96356dc240c509d96622c1cd4d5232fc1951119d0e8c5849
font_01_sfnt_off0001446f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446F 5248 bytes
SHA-256: 0a93c8bcd82bcf933bdb6a7ab251458c1d22dbf7b98fdc1f55f90edaa481f17a
font_02_sfnt_off00015629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15629 12084 bytes
SHA-256: c51eba10d2ec3ad24d9630668df45291020b86fd6829f64f4af4847b9f0672af

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