Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73a3ede48df5b76…

MALICIOUS

PDF

41.4 KB Created: 2020-11-04 04:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 82b49be623b7426ebc24e3a0a421a579 SHA-1: 0b2c52741aff537caf8485882bc4c2cbe3625311 SHA-256: a73a3ede48df5b766bb1a4d631587887caa8ea81316caba557886f3e0ca003f9
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://ttraff.cc/123?keyword=best+pro+wrestling+streaming+sites In PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/zizubuxefe_sofosu_gevize.pdfIn PDF document text
    • https://wajajudamivigo.weebly.com/uploads/1/3/4/3/134359543/zeterutiwalefatinab.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://vutifiruva.weebly.com/uploads/1/3/4/5/134595151/ed30caaec0390d6.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/f44f97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f9436b2d8754.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/34149.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/zarib.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/metakibeme/amtrak_maple_leaf_train_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1c891e9-9293-43b4-8e05-64b04359dcd5/16557896801.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/acalanes_high_school_2020_2021_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/puedo_superarme_bernardo_stamateas_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/57645316332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8700aec-f7a2-4a99-9571-25049fdbc5ef/vakubuxumo.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/26586239764.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/55582288007.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_off0000623c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 5280 bytes
SHA-256: dbe5a2cdf383d4cdeb206c4fb0a169b416dc2ab1420368e09bb9af99b13150f6
font_01_sfnt_off00007433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7433 10728 bytes
SHA-256: 7f8bebfe9e594f1e02c9cc15f854a023fccaa2ed64f565dceb5b1e10e8e91cb3