Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbcaeb7469f18a45…

MALICIOUS

PDF

54.5 KB Created: 2020-04-17 01:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 17b5cef003da5ce0c5d2af1af60e4c37 SHA-1: c1331be6b5aa9c1c444ae5c59fd1d9c1b4a9a4c4 SHA-256: dbcaeb7469f18a452d46dbdb21195b512d1053b49e27f80bf0ce37d42fe9faf8
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body, though heavily obfuscated, contains text related to an 'Edmonton movie guide', suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates a likely attempt to redirect users to potentially harmful content or phishing sites.

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://taoswellwoman.com/uploads/1/3/1/0/131070149/131070149.html#edmonton+movie+guide+west+ed
    • http://teamworkprofile.com/uploads/1/3/0/6/130605383/tupajikosokup.pdf
    • http://auggiehomebuyers.com/uploads/1/3/1/4/131406816/8880770.pdf
    • http://pakistanicomedian.com/uploads/1/3/0/5/130544001/2301733.pdf
    • http://tasmanianpolarnetwork.com/uploads/1/3/0/9/130969829/datunamunugudadelega.pdf
    • http://udomyte-corporation.com/uploads/1/3/0/6/130639259/ladop.pdf
    • http://ashlynhenson.com/uploads/1/3/1/4/131407214/bavowilina.pdf
    • http://palestinewildcatfootball.com/uploads/1/3/0/6/130604249/c684bc64.pdf
    • http://doctor365.org/uploads/1/3/0/6/130605125/f24f6af9.pdf
    • http://everyactoin.com/uploads/1/3/1/1/131164531/1971753.pdf
    • http://healthwealthzone.com/uploads/1/3/1/4/131452997/93570.pdf
    • http://vekogmbh.de/uploads/1/3/0/7/130740087/3faca2215d.pdf
    • http://myindipop.com/uploads/1/3/0/5/130551794/posigazozulizur-wewugulesik-roditakanonez.pdf
    • http://healthwea
    • 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_off00008fcf.bin
9a688a213d4eb4c639cd766a828f0224c6659547cf8a877d030aef0b326b054a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCF 9364 bytes
font_01_sfnt_off0000b381.bin
3e915a2a92ce4871798b91415c6686dd309a85b3d59b5464e29601d3ea4af0ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB381 17184 bytes

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