Malicious PDF — malware analysis report

Static analysis result for SHA-256 63106d66e378d38f…

MALICIOUS

PDF

136.0 KB Created: 2020-11-13 04:46:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4323dc076bf261062abdb590784c6ef0 SHA-1: 1e9b43c80584813770712d126241611d7d67971e SHA-256: 63106d66e378d38fc2be39460590d953a686e333153e1a94c5a8e9d1c6299b3e
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support this assessment. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=density+of+acetone+g+ml PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369322/normal_5fa4a7432cb70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f99647e6e5cf.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/fajeloninesitel/niger_vs_nigeria_football_result.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ebfb6b-8b88-4145-a9c2-8be8a078797f/37029310404.pdfIn PDF document text
    • https://s3.amazonaws.com/kamigovitakiril/83800866454.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/lapanurepit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c3bf35-a3de-4d1a-8121-9a469c03e584/tivananilarafelanirik.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/seduxitonorop.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/xemosiwarix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ea489d-c129-472e-bb72-3ac249ce0bcc/varebabunose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68e0d11-5337-4eaa-9297-31b846c8133e/teluradazijupununedorox.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ad61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD61 6492 bytes
SHA-256: e372b72275a5be51254aef29237819e264f8666627f7fcebc053501b44a96939
font_01_sfnt_off0001bd95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD95 5208 bytes
SHA-256: e5e461cad98aec1349bf9b9141d257b1a0c14800f1d9dd9ad0f12fbc4c8b2270
font_02_sfnt_off0001cf52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF52 14008 bytes
SHA-256: 6ef7c1f7b21a634f2ee5f74a6a692c01a425c6c744c8ba1a3a11130ed7af31e2
font_03_sfnt_off0001fc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC20 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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