Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccbf749fbecd857…

MALICIOUS

PDF

51.2 KB Created: 2020-04-02 10:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3d6597a48b213c9ec44d11965e0b823c SHA-1: 928c680529228b95b22cbe5835602fbf671181cf SHA-256: 0ccbf749fbecd8577175e13cfa35a1b05120e29e70c1cb43f3344fd7bb79db0a
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains and likely serve to manipulate search engine results or distribute malicious content. No scripts were extracted, but the presence of numerous external URLs suggests a phishing or content distribution attack. The ML classifier also strongly indicated maliciousness.

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://planetvag.de/uploads/1/3/0/7/130776433/130776433.html#viridans+streptococcus+icd+10
    • http://magaliwarlop.be/uploads/1/3/1/0/131069753/fa4f1bc136.pdf
    • http://juanodeonphotography.com/uploads/1/3/0/5/130539841/38f17efd291ff5.pdf
    • http://frontierbuilders.org/uploads/1/3/0/4/130478067/xemipi.pdf
    • http://rexburgrealestateagents.com/uploads/1/3/0/7/130775676/4c2ba8e5b811.pdf
    • http://abbu.ch/uploads/1/3/0/9/130969645/828238e6cb72b5e.pdf
    • http://movierulz.watch/uploads/1/3/0/7/130739261/woreru.pdf
    • http://fivestarorganizing.com/uploads/1/3/0/4/130476143/20f94ab84f8b.pdf
    • http://tenarizona.net/uploads/1/3/1/3/131381414/nabesid-xoxuperugir.pdf
    • http://physionary.com/uploads/1/3/0/3/130323707/f55aeb.pdf
    • http://theboutiquelania.com/uploads/1/3/1/4/131437434/worug-nazivukifu-junex-gojizuvez.pdf
    • http://angelahoffmann.com/uploads/1/3/0/6/130604536/bf0c4893.pdf
    • http://connorjouppi.com/uploads/1/3/0/7/130739837/dolizujilaregomoj.pdf
    • http://margravepublishing.com/uploads/1/3/0/8/130874091/jodonavarobizopo.pdf
    • http://greatgiftsacrossamerica.com/uploads/1/3/1/3/131398234/7132861.pdf
    • http://six18gfx.com/uploads/1/3/0/9/130969059/nawonuw.pdf
    • http://sbtranch.com/uploads/1/3/0/6/130639153/xejozegikub-girefilu.pdf
    • http://nukafitness.com/uploads/1/3/0/6/130604499/6385b5cb3ff65.pdf
    • http://gohighropeaccess.com/uploads/1/3/0/4/130489102/sorewolidiv.pdf
    • http://triplecent.com/uploads/1/3/0/6/130621190/56547b6b8c5b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009405.bin
76be171c2e4170ce1751f7db6ce003033e7588e97a426a99d339144190df6482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9405 8980 bytes
font_01_sfnt_off0000b4e8.bin
4d9ec2aec8f1ca6bebe1b56492fd55a77bba3a6e98efb76508c1b835d4eb9912		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E8 2860 bytes

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