Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ab3c83c9d7e0d1…

MALICIOUS

PDF

76.1 KB Created: 2021-02-21 07:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9bf9d40c6895c5cabad8a472f4b026b0 SHA-1: dbeb1c3707c6ff3ebe7561b340d088fc4bf07aa3 SHA-256: 83ab3c83c9d7e0d191c0c268229110aff1989ccd2b661b9cc005e3421eb83ccc
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized content, a common tactic for phishing or malware distribution. The primary URL, 'https://maypoin.ru/wix?keyword=2002+ford+mustang+repair+manual+pdf', is presented as a repair manual lure. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://maypoin.ru/wix?keyword=2002+ford+mustang+repair+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381752/normal_6023d68fdb9b3.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/Wjd2hjL/xukaxuwolafojatanifipi.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/jgehcgc/blank_tree_template_with_roots.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/eZ7hheM/jogib.pdfIn PDF document text
    • https://refedekejevejat.weebly.com/uploads/1/3/4/3/134312363/jenoledetatexato.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/jjhgnpr/cute_cartoon_aesthetic_wallpapers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_5fd68c2e3ffdd.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/jgJdUZV/91368445537.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/VpJYXia/sans_undertale_pixel_art_color_by_numbers.pdfIn PDF document text
    • https://cdn.sqhk.co/tijaxasazuwi/ibu45FZ/78066955635.pdfIn PDF document text
    • http://eeuuurrrrr.space/ferigitn6tca.pdfIn PDF document text
    • http://shimano-stradic.ru/779584671cf5xg.pdfIn PDF document text
    • https://cdn.sqhk.co/vetejevibas/hibGTIF/shopping_deals_coupons_promo_codes_discounts.pdfIn PDF document text
    • http://stnold.com/minecraft_among_us_polus_mapqqzd3.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/nagudo/33216522675.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/free_guitar_chord_sheet_music_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/75371324519.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 5540 bytes
SHA-256: 16a987cf17d045eda17b8ac0dc82f4525a625b0f8c7f821edcb71df7ac918f6f
font_01_sfnt_off00010005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 10324 bytes
SHA-256: a28e035532b66effced7cbb0716dfebcaeaf18af56a038240baee8ff427dd44e

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