Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f331922dbea240…

MALICIOUS

PDF

39.8 KB Created: 2020-03-31 10:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 28358dc27a6a2932dfa93da2aa8c065c SHA-1: 1fa272ace78d55c55a12d79576020b4e3445a3c3 SHA-256: 30f331922dbea2402fe30dc75141b6121490f5f2f3db542501b96411b9096866
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The embedded URLs likely serve to distribute further malicious content or to manipulate search engine rankings. No scripts were extracted from this sample.

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://dantoned.com/uploads/1/3/0/5/130589191/130589191.html#definicion+de+barra+de+menu+en+informatica
    • http://sunderlandhandyman.com/uploads/1/3/0/4/130436140/jasen.pdf
    • http://inourworld.net/uploads/1/3/0/5/130551298/sepajo_gomoxuj_dopuro_dijag.pdf
    • http://saberoportuno.com/uploads/1/3/0/2/130270753/fisiduku.pdf
    • http://motivemd.com/uploads/1/3/0/6/130620616/3c43b58eef.pdf
    • http://distancelearning-today.org/uploads/1/3/0/2/130271016/xisudit-nuvojilu.pdf
    • http://dybowski.ca/uploads/1/3/0/8/130813059/e1461b0d952a1a.pdf
    • http://mosquitobrf.org/uploads/1/3/0/3/130379347/5c30f6a503765a.pdf
    • http://orlandorealtorsfoundation.com/uploads/1/3/1/3/131398379/zujiwureles.pdf
    • http://tamiekasmithphotography.net/uploads/1/3/0/5/130546717/08f3af.pdf
    • http://cocktailsnponytails.com/uploads/1/3/1/4/131437689/9e6ef61626a51.pdf
    • http://balveworkout.org/uploads/1/3/0/8/130874398/cdac56.pdf
    • http://jaxlawnmaint.com/uploads/1/3/0/4/130488780/ec60dae673099.pdf
    • http://cherokeelightingandsignservice.com/uploads/1/3/0/7/130739537/berododat.pdf
    • http://compressionsuorce.com/uploads/1/3/0/5/130588396/ninojuzo.pdf
    • http://safesoundhomeinspections.com/uploads/1/3/0/7/130776492/jujodizali.pdf
    • http://mrsmauck.com/uploads/1/3/0/9/130969791/bedaroko_wekevure_nasusofok_joladozifu.pdf
    • http://martezclothing.com/uploads/1/3/1/0/131069893/a2be0.pdf
    • http://clayocomedy.com/uploads/1/3/0/8/130873875/e23294f.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_off0000725e.bin
5fc470ad301abe0a2d2101aea1a72dc79bae565ebbf9ac240a2418e2309ab884		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725E 8660 bytes

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