Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde79678d56863c2…

MALICIOUS

PDF

98.3 KB Created: 2021-04-08 02:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c5a6f5580d46b264a98b09b2ef0249cd SHA-1: 1c3489e61996a0c348293a1801876b46a4f09a8f SHA-256: dde79678d56863c202d42538b03227ad2df04ef82a29513003cf674ce0650db4
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to obscure the ultimate destination. The document body, though partially corrupted, contains text related to 'New York State mandated reporter line' and 'payment redirection', which are common lures for business email compromise attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/123?utm_term=new+york+state+mandated+reporter+line PDF link annotation
    • https://cdn.sqhk.co/seworani/cjirywB/stick_war_legacy_gameplay.pdfIn PDF document text
    • http://pokovata.scienceontheweb.net/84972759450.pdfIn PDF document text
    • http://kusukeluwabe.mywebcommunity.org/daturokufuwen.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/jhjj3jh/download_tower_conquest_mod_apk_terbaru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_69edd023df2244738904457c61e35bd4.pdf?index=trueIn PDF document text
    • https://57ead060-d7b3-4f59-a803-6c9b47c0028a.filesusr.com/ugd/f30481_600aa29a70564d6f952f2fb49b2a7578.pdf?index=trueIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_37ff6c39dd614788918db41513d445dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varoximu/17517226643.pdfIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_246d73002d85416589e5b95a2b0be6db.pdf?index=trueIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_e4b8795254c34a3b81771bde280def83.pdf?index=trueIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_960da59809bc43cb99df7788553a59fa.pdf?index=trueIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_563002eec0094435816b1288dd9084fe.pdf?index=trueIn PDF document text
    • https://8df9d1b7-8f6e-49e1-bdac-c9da4d4291fd.filesusr.com/ugd/12c198_9fccb687d99f46bdb5ecba87778f4be5.pdf?index=trueIn PDF document text
    • https://37dcb74a-b492-4e6c-94d7-6984b04a3d7f.filesusr.com/ugd/01eaca_2298a30e9b194b2a8982a3618241564b.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_c96bc942faee404e96f2d42b7e90e199.pdf?index=trueIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_31493cd2730346019987479574e35f1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/11810539363.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/14171760991.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_ebc757431eb7446faa230bfcc181cbce.pdf?index=trueIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_4b0460bfea3b4bd0aacdd64758acdabd.pdf?index=trueIn 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_off000142e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E4 5332 bytes
SHA-256: e5245291cb7501eaa09e41ab7b94d484e1e4a2df9e702b678ea30c7a8f623d29
font_01_sfnt_off00015510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15510 11460 bytes
SHA-256: ef3d34ca1fe3732ca791fdfb2b86ef57c0b739b916cffaedaa10a917b210d536

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