Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70fde4c883fd6b8…

MALICIOUS

PDF

41.3 KB Created: 2020-04-02 05:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a99f2de489986da6d19fe7180ff5cb4a SHA-1: 3212a038238a91fd90fe18bac8d282add8a98b76 SHA-256: b70fde4c883fd6b81c10c1fb60110783928c0ac0ee58f931e063338576bd47f4
92 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to other PDF files hosted on unrelated domains, suggesting a link farm or SEO poisoning tactic. The document body contains text related to 'Actividades para la tabla del 6' and metadata indicating it was generated by wkhtmltopdf, but no direct malicious script or payload was found within the PDF itself. The primary malicious activity appears to be the redirection to a network of potentially malicious or spam-related PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://thedogbedcompany.net/uploads/1/3/0/5/130589227/130589227.html#actividades+para+la+tabla+del+6
    • http://gelowitzsoccerschool.com/uploads/1/3/0/6/130621351/wupuzaxilukakadun.pdf
    • http://takeittothebankguns.com/uploads/1/3/0/2/130271206/belabezukugax.pdf
    • http://highestandbest.realestate/uploads/1/3/0/5/130539269/1bfb6.pdf
    • http://snapchathoes.shop/uploads/1/3/0/6/130620521/danajuvewiwa_komilojax_wugamivopuxa.pdf
    • http://flexihose.in/uploads/1/3/0/2/130272945/fb2dc2e86824.pdf
    • http://simplykupcakes.com/uploads/1/3/0/6/130639706/4a8b8.pdf
    • http://lifecoachcyril.com/uploads/1/3/1/3/131381553/danogebuteb-kuzuf-tasixigu.pdf
    • http://lksspringfest.com/uploads/1/3/0/3/130313191/kugavubutibuvomavujo.pdf
    • http://psuram.org/uploads/1/3/0/7/130740323/jupiwox.pdf
    • http://pottershouse.cc/uploads/1/3/0/2/130273573/misojinuwa.pdf
    • http://patelliswrites.com/uploads/1/3/0/6/130622024/giguwimol-febakawotareko-numog-subexamipire.pdf
    • http://foodfriendsandtravelnetwork.com/uploads/1/3/0/6/130605472/4679523.pdf
    • http://tetburyremovals.com/uploads/1/3/1/1/131164252/5877260.pdf
    • http://hostmaster.successchoices.ch/uploads/1/3/0/8/130814397/0f5e16c2b.pdf
    • http://loods25gent.com/uploads/1/3/0/7/130739301/5702855.pdf
    • http://thebleuplatespecial.com/uploads/1/3/0/7/130774990/3535222.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006388.bin
563df8fd0ea7d6b057fb67f664824b60443f2f7513c33d2840ea4dea32b0926d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6388 8048 bytes
font_01_sfnt_off00008138.bin
de2ccdaff894287c651098c150fd5616560153c4f3534cf13f84c42cbd896a5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8138 16060 bytes

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