Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ef3ec1009a41b4…

MALICIOUS

PDF

36.7 KB Created: 2020-04-17 03:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 21aae148d630f3af7b20f82ab9a7f82a SHA-1: fc643ae9e2136b5345f0b8262ce1d7176b5cf9a7 SHA-256: 62ef3ec1009a41b4ab2c6327b3a590ae33134bd09452b9e27eccf82719542611
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by an ML classifier as malicious and contains a large number of external links, indicating a potential link farm or redirection to malicious content. The document body, though heavily obfuscated, contains URLs that are also present in the extracted URL list. The primary purpose appears to be directing users to a network of suspicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://rockcandyceramics.com/uploads/1/3/0/7/130738797/130738797.html#associative+mapping+pdf
    • http://capehousebbnotl.com/uploads/1/3/1/4/131454593/pamidazifiwivuj.pdf
    • http://tallskyventures.com/uploads/1/3/1/4/131438693/78912495.pdf
    • http://bluecazaembillir.com/uploads/1/3/1/4/131410538/purejesorako-memuz-rofazuz.pdf
    • http://thelashloungeandbrowbar.com/uploads/1/3/1/6/131637257/rimexokosi_pifas.pdf
    • http://mivomaskin.no/uploads/1/3/0/7/130776074/7215373.pdf
    • http://idomeditationonline.com/uploads/1/3/1/4/131437844/seroguzis.pdf
    • http://apeldoornongediertebestrijding.nl/uploads/1/3/1/3/131398347/vomukalemaxajaw_bunepokoxegu_nokurufarufujag.pdf
    • http://lionslandscaping.net/uploads/1/3/0/5/130543368/xukoxakajode.pdf
    • http://fitworksconcepts.com/uploads/1/3/0/5/130550775/72f307e.pdf
    • http://thecornishgiftco.com/uploads/1/3/0/2/130272362/rokorur.pdf
    • http://gindystires.com/uploads/1/3/0/5/130589161/xisawonoso.pdf
    • http://jhadaproductions.com/uploads/1/3/1/6/131607005/lijumugozarox.pdf
    • http://caskmutation.org/uploads/1/3/0/5/130550903/gipimafe_farinuwomamaxep.pdf
    • http://mickeyglitter.com/uploads/1/3/0/7/130738543/2ec4da56.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068dc.bin
d02454bc30667e694c935c3467b76aa7db0e0978701f9d5773d5e81c9581cb40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68DC 7648 bytes

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