Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d961982f678163…

MALICIOUS

PDF

35.3 KB Created: 2020-10-09 12:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: da543a3ae9c69680bf429132b7f2161f SHA-1: 653212266749495a4dc7dc616e31f401d83353a9 SHA-256: 99d961982f678163d79e0984f05b07809ea772efbd20ca7abb58ad2c4283bab0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=ionic+or+covalent+bonding+lab+answers In PDF document text
    • http://gebasig.dfmmc.com/uploads/1/3/1/8/131856570/zifofalukebikur.pdfIn PDF document text
    • http://nafosomew.bartsbullets.com/uploads/1/3/1/6/131606552/ruteripubolajob_bujivu_mimaxazevetimag.pdfIn PDF document text
    • http://nidij.wgscontemporary.com/uploads/1/3/1/0/131070450/56636bcfcc2.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/mukamoturuxotapewepa.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/nusowopebuziwur.pdfIn PDF document text
    • https://site-1039806.mozfiles.com/files/1039806/9133060629.pdfIn PDF document text
    • https://site-1039437.mozfiles.com/files/1039437/34368652086.pdfIn PDF document text
    • https://site-1038520.mozfiles.com/files/1038520/gupamolotixa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac79a7b5-1403-403e-b539-73e93b4542aa/78853390331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217d59da-ef0a-46c3-823d-c704e4b856a6/faleduzuvolomikiwaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2eaaa9-2e10-43ff-bda5-e178a0dec35f/28985567466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1250/5243/files/3_pot_crock_pot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1170/6527/files/anime_black_cat_with_green_eyes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2266/3835/files/short_life_unblocked_games_66.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0213/3667/files/soleus_air_heater_air_conditioner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/4143/6060/files/the_goophered_grapevine.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_off00004c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C83 5336 bytes
SHA-256: 06bf78244cb83553af48a605075f6573139d39782689d556e7345f74288fb238
font_01_sfnt_off00005ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC3 9856 bytes
SHA-256: e3f5f9b9cdb97c8931becad2f4c7e86cba2d57fdf8e1304ccb438d74ec5c1647

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