Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d6f74a4ea200cb…

MALICIOUS

PDF

74.3 KB Created: 2021-03-10 13:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5e43d2ea9a3132e50d3bc14cf6a4be34 SHA-1: 1fda87d8df7d7db2d08a74ac96fef076871e9b62 SHA-256: b3d6f74a4ea200cb1188987a74ba5ea5d8d4798dd5c4394f49c590b46e8d6e64
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection strategy. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URL points to a suspicious domain, further supporting the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/123?utm_term=lagu+arilena+ara+i%2527+m+sorry PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454041/normal_5fdf1355e3238.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/43nraG8/17937371137.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/burket_s_oral_medicine_10th_edition_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/gggAif1/dictator_2016_trailer.pdfIn PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/22714419b7a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465007/normal_60174fab8c0b7.pdfIn PDF document text
    • https://cdn.sqhk.co/fakosopalo/ikpiihe/happy_orange_cat.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/sofezinexalagu.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/why_my_panasonic_tv_keeps_turning_off.pdfIn PDF document text
    • https://golinogejus.weebly.com/uploads/1/3/1/6/131606227/7d443ff6.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/l1qzTjd/personal_care_assistant_resume_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475861/normal_5ff6cf5e30e24.pdfIn PDF document text
    • https://nipujari.weebly.com/uploads/1/3/1/3/131384055/fidugixidivok.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://s3.amazonaws.com/lemefofutomapox/bang_bang_full_movie_hd_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/byram_healthcare_ostomy_order_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/xikesazikajizinuxife.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/edema_cerebral_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/97061075285.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/pitupikuxopujiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/finding_angle_sum_of_regular_polygon.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/are_polar_bears_increasing_or_decreasing.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_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 4884 bytes
SHA-256: 2eab80b63328bb964b6a4b211f673e7764b6e2dd533ac57dc9050cec3120cf9b
font_01_sfnt_off0000e5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BB 13112 bytes
SHA-256: fba58fe918a3655dc536a828452627dc19b728c202db3b965867395a1e40f9fc
font_02_sfnt_off00010db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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