Malicious PDF — malware analysis report

Static analysis result for SHA-256 588daca44c57b87d…

MALICIOUS

PDF

28.6 KB Created: 2020-05-27 09:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22564bd536be6f4c13a38b20072abc14 SHA-1: 310461eae7dcfce6ea6aa9b99dbf99f2f9951192 SHA-256: 588daca44c57b87d14f5ea60dd2dc5dc95dc95ebbd6b119dccf1ec5d87276c2d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged as malicious by an ML classifier with high confidence. It contains a large number of external links, many of which point to other PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The document body contains text related to a book title and author, likely serving as a lure to disguise the malicious intent of directing users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://speyroma.com/uploads/1/3/1/6/131606133/131606133.html#david+j+griffiths+introduction+to+electrodynamics+amazon
    • http://grayfurnacemanmakesbeermakesbeercom.com/uploads/1/3/1/3/131383753/jareda.pdf
    • http://jherreraphoto.com/uploads/1/3/1/3/131380054/zemob.pdf
    • http://purplecottageproperties.com/uploads/1/3/0/4/130494478/7929993.pdf
    • http://jnmovement.com/uploads/1/3/0/8/130814984/tabodevem.pdf
    • http://postpartumrecoveryfitness.com/uploads/1/3/0/5/130543468/61f176bda64b21.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_off000047e7.bin
18add1299cef6f1d0e9e1cbaa955d7b6b3c6106d21392456e4db4aff18f6c161		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47E7 9408 bytes

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