Malicious PDF — malware analysis report

Static analysis result for SHA-256 24406c80f40d183c…

MALICIOUS

PDF

44.4 KB Created: 2020-04-05 13:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e1ca28ea2de0aa69d33cf343e5fabf4b SHA-1: f906c92af355828d0d52a7c124e79e85b1adcd8a SHA-256: 24406c80f40d183cfd28d072208dd2375e2690e453b77a3b2e1f95dcae2eac68
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used in SEO link farms to manipulate search engine rankings. One prominent link points to an HTML file suggesting a game download, indicating a potential lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://poweredbytheblueoval.com/uploads/1/3/0/6/130621864/130621864.html#descargar+marvel+vs+capcom+1+para+pc+portable
    • http://billrobards.com/uploads/1/3/0/7/130740556/fajazerikapuwu_bawevawilit_towejojisolu_lofiwosewagob.pdf
    • http://inclusivetechnologybydesign.com/uploads/1/3/1/4/131482892/9ebc404c.pdf
    • http://addict4hiphopradio.com/uploads/1/3/0/5/130589391/xuxofexete.pdf
    • http://312woodworking.com/uploads/1/3/0/5/130588467/4834157abbc7.pdf
    • http://the-first-choice-travel.com/uploads/1/3/0/6/130620801/2535363.pdf
    • http://skinnytiffy.com/uploads/1/3/0/5/130545096/molebunavadudi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005443.bin
ad5eb18233cf80b402ad855872cb23214ecd8d7cc273c249a2e7b2e3b3a4edcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5443 9016 bytes
font_01_sfnt_off0000751d.bin
bf9b9d10e9d9890ab9d1a7ec18efb3f3b6daf3583292778e90f0943f39e87841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751D 2600 bytes
font_02_sfnt_off00007e1a.bin
55f98e56f1e7ec732bdf90d91ba3c4512f6824328a5259e063eaff364bc831c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1A 4556 bytes
font_03_sfnt_off00008c92.bin
28c9deefd5e0bec2852a01979ddd0e6a5b33bcb89dfd6e22ed2a20125a5ebf03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C92 16120 bytes

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