Malicious PDF — malware analysis report

Static analysis result for SHA-256 5938f2017346a2ac…

MALICIOUS

PDF

131.0 KB Created: 2020-10-27 06:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e409973073b5c66c8885e42608b57177 SHA-1: d55c47ab6473ab8305eb1fd1f9e8bb19c6bea0e8 SHA-256: 5938f2017346a2ac4dfcb452b3ae9acfa28c481c19f25196ab8cbabd5c588d0c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?keyword=jacques+lacan+psychoanalysis+pdf In PDF document text
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/zizomobane.pdfIn PDF document text
    • https://rofetavagamufup.weebly.com/uploads/1/3/4/3/134373504/2785844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5f918765dd0dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f8c50f1e0489.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/nuluri.pdfIn PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/2853262.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6249/9765/files/stompeez_uk_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/wovim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5213/8137/files/android_9_patch_change_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4195/5221/files/killer_bean_game_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f825c355-1261-41cf-bc7a-dab57db27282/52253062939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62bf4d96-9e05-4a04-8285-65c9a7105cdd/mekodakejor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68980f91-d1b2-4bb5-8b74-b12191f3ea3c/woxurigenonijoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60165985-0d66-48d8-a78b-11384005e893/95240484301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd4c85c9-9cb3-4f7f-ab7a-8084317287df/kanijujosasebisamorax.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001c8d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C8D9 31328 bytes
SHA-256: 81e0d934e32f2a0a893562f83577848862cfd4170eff65282faced5151ece94b
font_00_sfnt_off00019042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19042 5364 bytes
SHA-256: f1ba0bd804bf16701cb3371f5b1c9c2353e82d10ea6cb1ce70df4551967d63ad
font_01_sfnt_off0001a283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A283 11732 bytes
SHA-256: b6d180dc1241b75848fae18bdb718feb79ad39fe231d7618c2e69eeaa825e5be

Open this report in the interactive analyzer, or submit your own file for analysis.