Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cd393c5c50dfda…

MALICIOUS

PDF

50.7 KB Created: 2020-04-01 17:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d486d1082e6ad3ae09b7c0a16ac96382 SHA-1: 01e0f8803c5fb3205d70dfe0997c9fc2104fd912 SHA-256: e0cd393c5c50dfda1bac3cb14e60ae472ef301f310015ebaec66bd673cdedd1b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by an ML classifier with high confidence. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The primary URL, http://maternityone.com/uploads/1/3/0/8/130874517/130874517.html#mitsubishi+mr+slim+ac+review, appears to be a lure, possibly related to product reviews, to direct users to further malicious content.

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://maternityone.com/uploads/1/3/0/8/130874517/130874517.html#mitsubishi+mr+slim+ac+review
    • http://evolvesbc.com/uploads/1/3/0/8/130813899/949288.pdf
    • http://parkavenueeventscenter.com/uploads/1/3/0/4/130489054/6682351.pdf
    • http://h2hfixit.com/uploads/1/3/0/5/130544386/tasupip.pdf
    • http://rainbowrehabtherapy.com/uploads/1/3/0/3/130313491/6670015.pdf
    • http://cpanel.barneyspumps.com/uploads/1/3/0/3/130379407/bbefa7.pdf
    • http://alpineranches.com/uploads/1/3/0/6/130621331/ligikusaja_fupatov.pdf
    • http://pvbarkinthepark.com/uploads/1/3/0/3/130313106/d81507dde.pdf
    • http://cnccollection.com/uploads/1/3/0/7/130739557/ec137f4.pdf
    • http://thesockingdead.com/uploads/1/3/0/6/130621634/veneju.pdf
    • http://pardicair.com/uploads/1/3/0/7/130740082/nejonudega.pdf
    • http://faithfx-investments.com/uploads/1/3/0/8/130873996/liromivelux-ganola.pdf
    • http://goldenfleecepress.net/uploads/1/3/0/4/130483515/1d6642f3d.pdf
    • http://honourthyking.com/uploads/1/3/0/5/130542972/nifelisigalon.pdf
    • http://laserscannerrentals.com/uploads/1/3/0/2/130287424/ea4b11b1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008460.bin
8c65c4ed8f417026cdc6148d771a73d0a481f50c1ecd4bcee03bd6cf47887a05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8460 9408 bytes
font_01_sfnt_off0000a7a9.bin
0cc7d987b4e16397ef313ec0d1375f7b14fb19e88b64a3780f7835187f2ef04c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A9 16416 bytes

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