Malicious PDF — malware analysis report

Static analysis result for SHA-256 456fe9e752804418…

MALICIOUS

PDF

96.1 KB Created: 2021-03-18 07:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 25a0cf33db8306c217c5e959a41b9b22 SHA-1: bbf1fdcebc42058909294a741d4eca641218b867 SHA-256: 456fe9e7528044188cce942d8f8fa318beb27c1d68a56926352160d1ae8b5a9e
196 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm attack. It contains multiple external links, with a primary redirector URL pointing to 'https://baarspo.ru/wix?keyword=2ds+capture+card+amazon'. This URL is likely used to host malicious content or redirect to a phishing page, aligning with the 'free-download phishing' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/wix?keyword=2ds+capture+card+amazon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480893/normal_601a8282ba03a.pdfIn PDF document text
    • http://ziposodepow.mywebcommunity.org/dcs_world_f_15_radar_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470027/normal_6003e5a7d9a4f.pdfIn PDF document text
    • http://witomemu.scienceontheweb.net/55984689304.pdfIn PDF document text
    • http://gtmedis.com/how_long_is_the_prose_eddapibe1.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/40598789730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482406/normal_5fcee46bc0e8f.pdfIn PDF document text
    • http://nigasheff.xyz/plan_de_meuble_en_bois_gratuit7inqc.pdfIn PDF document text
    • http://dayzcommunity.info/defense_dead_apkw1dm0.pdfIn PDF document text
    • http://cocobuka3.xyz/desutu62t6p.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/cameroon_history_since_1960.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/xulikamul/java_web_application_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/14840036928.pdfIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_1bc1da25925f4ccea562e6b8e4e8bd1f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levovod/printable_battleships.pdfIn PDF document text
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_0c0d538667c64b8c8b343fcce00e9e62.pdf?index=trueIn PDF document text
    • http://xenivut.epizy.com/18617858770.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/subegetinus.pdfIn PDF document text
    • http://paserarun.rf.gd/sundiata_an_epic_of_old_mali_dt_niane_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/vatapuxutaxagamemirim.pdfIn PDF document text
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_fd0152f22599467d856d08ef6c959d36.pdf?index=trueIn 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_off00013a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A78 5276 bytes
SHA-256: 5758c8641821a63a67333da91a05575805467c7fba34f70c2e1b09bd3e75498c
font_01_sfnt_off00014c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C53 11336 bytes
SHA-256: d5d970d262cc56c9a1867e4ef99ebd56d53e5f9641a688c243e895cbfb7c00d4