Malicious PDF — malware analysis report

Static analysis result for SHA-256 521ea19162127ddd…

MALICIOUS

PDF

70.3 KB Created: 2021-02-23 13:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e5d9e9a8721d88ef501129eadb8753ca SHA-1: e810276180b1c544376bc123aefc7f44f1fbfd96 SHA-256: 521ea19162127dddbea312532baf11db0c203b9cb35c793b640380ff27cad751
196 Risk Score

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://bologen.ru/wix?keyword=minecraft+pc+apk+mod PDF link annotation
    • https://cdn.sqhk.co/bigulikexupa/f1SQLha/wise_eyes_burnham_pa.pdfIn PDF document text
    • https://linerebe.weebly.com/uploads/1/3/0/8/130813546/5716347.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxikinanibu/MPDBzii/saxusazafitube.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/jhiE0jc/rush_rally_2_mod_apk_1._143.pdfIn PDF document text
    • https://cdn.sqhk.co/vamapoludi/7iahaxc/28281347145.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/6P7F4ih/reset_beats_x_earphones.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462341/normal_5fe62b6661023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_6029ff2a731f4.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/aSjgMiI/toronto_city_council_ward_map.pdfIn PDF document text
    • https://denafeferigo.weebly.com/uploads/1/3/0/8/130874231/368589.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/Lhdibqc/the_aether_life_as_a_god_achievement_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xamowizaso/dPhgQic/kudaxigakenobobunamud.pdfIn PDF document text
    • https://cdn.sqhk.co/vizelupavew/wKgeibI/bollywood_ringtones_download_2019.pdfIn PDF document text
    • https://mufejuraziga.weebly.com/uploads/1/3/0/8/130814984/teresugobidafejot.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/hihbViV/9485103066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xakusineba/43272411946.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0A 4948 bytes
SHA-256: 991a97cbffcf83fbc60308d46b6e24cd33aa4660132decf27a4b40333304d561
font_01_sfnt_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 10472 bytes
SHA-256: 4f3b0186a3535f8b293f1f395db975e45675c369d3661709b94ef5dd36862058
font_02_sfnt_off0000fe95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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