Malicious PDF — malware analysis report

Static analysis result for SHA-256 16da9f6bd6ec7170…

MALICIOUS

PDF

73.4 KB Created: 2020-12-31 18:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ec27ac73e9703c3ba92fcc5831b5d6cc SHA-1: ea797cd2de063e26ba783915b3474a61d2d3ff76 SHA-256: 16da9f6bd6ec7170bb25d1ca9d254959b1e911c977a826218aac135185f00011
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, including one that acts as an SEO redirector for a fake download lure. The presence of embedded URLs and the overall structure suggest an attempt to trick users into visiting malicious sites, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafftec.ru/strik?utm_term=download+drag+sim+2018+mod PDF link annotation
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/mekuwukipadunukejole.pdfIn PDF document text
    • https://tokadasokavetim.weebly.com/uploads/1/3/4/6/134688198/528572.pdfIn PDF document text
    • https://cdn.sqhk.co/bixatavafut/HtdbNge/53544017485.pdfIn PDF document text
    • https://cdn.sqhk.co/jasowipe/RibsgjV/15641971512.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/Kuuhix1/sultan_mp3_song_free_download_mr_jatt.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/jiguwuzobozobaz/32804779410.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/gym_ball_exercises_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506dbc1c-963e-44d3-bea6-7b01f6ff8ddb/89624922039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6392595-b5b7-4485-8eb5-410b288b9ce8/dk_guide_to_public_speaking_free_onl.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/vuzijepavoruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa52df89-7ba1-4cf9-b4c4-d90d4f642037/sun_dolphin_american_12_jon_boat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd90fda5-4705-48a3-b2e8-c8b68681d399/54181995730.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/70017812502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f78120-1de0-4b31-b06e-0d2f60d6bbec/49681065202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f94c031-619c-4691-9355-2892d502a02e/the_art_of_analog_layout.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/nusemo.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 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_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 5756 bytes
SHA-256: 7590893c506247ba07a8ae8b875acbbe090c85cda270f4b5ee8080f15c03dd69
font_01_sfnt_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 11644 bytes
SHA-256: 11754613db8f5749695f2fd64f3e19b03f22613d9a2d182519f204f7f870b2c1

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