Malicious PDF — malware analysis report

Static analysis result for SHA-256 943cd283efbb509b…

MALICIOUS

PDF

64.4 KB Created: 2020-12-23 14:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6759230b7b21ac59210c8b709cb1d98e SHA-1: c5a1e4da3019000ebad93e70aa4697cdb4e3b749 SHA-256: 943cd283efbb509b0f55831056509c5fd8ef21348871896536778f5291324e16
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic firing for a redirector link, indicating a phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary IOC is the redirector URL, which is likely used to lead users to a phishing site or download further malware.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafficel.ru/strik?utm_term=market+garden+brewery+store+tours PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448743/normal_5faaca8f7378f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467571/normal_5fae813a6b98e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_5fbe71202075a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5fa51ca71cdb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_5fba72a181ec0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470960/normal_5fcfa2929b998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_5fb869b3c190e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391649/normal_5fe2b853a9820.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legesiliv/metric_system_worksheet_answers_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5a0f81-5367-4ea4-b367-7d11321f0657/nekekutolekosamimewabav.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/gelopebeseranijog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3d9a2a-1187-4abc-91f7-e8185e140a41/that_time_i_got_reincarnated_as_a_slime_light_novel_volume_4.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/60863997422.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/context_clues_multiple_choice_exercise_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/17246952489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422cd3f2-7d64-4620-b3bb-b78ddda583bc/52848098104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c91cf8-81fb-4996-b7ac-e762c5ce9c0b/87330820860.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/compilation_report_for_consolidated_financial_statements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ed8069-365e-4160-80f3-e35994b9e51a/18785812197.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

Related samples 6

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_off0000bd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD70 5364 bytes
SHA-256: b369929596e819df0d6bfc50ab2ee97099906115a888f1cdbe82c57ec2103fe6
font_01_sfnt_off0000cfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDE 10660 bytes
SHA-256: 25f37861ecff552faeb5429a4714b8fb10db3269b9612a402d958062a0008bc7

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