Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa1ad20e2cfb763…

MALICIOUS

PDF

73.3 KB Created: 2021-02-25 05:38:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 478e0612f3fc525709bc57be97032345 SHA-1: c2c3ba1084e86119c99320f9eea82e577f92d6e9 SHA-256: 7aa1ad20e2cfb763291aefd31d20033f9bba98b13a1613d0317f9987c2065da6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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=rs+07+wyrms+guide PDF link annotation
    • https://kopusinuzek.weebly.com/uploads/1/3/4/1/134131929/6c768e3d.pdfIn PDF document text
    • https://mamifamutimas.weebly.com/uploads/1/3/1/8/131871874/3de0b2.pdfIn PDF document text
    • http://dontbeshy.xyz/what_is_the_healthiest_wild_game_meatdnm4i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_602470db95e4f.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/free_mixed_parts_of_speech_worksheets_with_answer_key.pdfIn PDF document text
    • http://boost-shop.xyz/logitech_harmony_hub_reviewn90b2.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/kozowz7ul8.pdfIn PDF document text
    • https://nunigagajil.weebly.com/uploads/1/3/4/7/134751499/wanuxox-falawidolivo.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/bajapovogam/grafana_alerts_template_variables.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/jepuvamidatilojolaje.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/fururupetav.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/13943984156.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/ganibuguxawod.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/android_update_for_asus_zenfone_5z.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/38525757436.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_off0000e066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE066 5324 bytes
SHA-256: e74f6bbf911bcd3b011496c4bf4a4de27af6b3cc09a2d5c77c80a5b2e8c54360
font_01_sfnt_off0000f296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 10740 bytes
SHA-256: b2808480f9762a52a4f27fc74d1ccdec23d2a70dd71a52fbe784bf98f48367c7