Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cfa369dc82c1e43…

MALICIOUS

PDF

43.2 KB Created: 2020-03-22 13:49:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7bf0133743baf5eae0bad8475d84a25a SHA-1: a623e7b47b4db1b568cabbc9624173e74a062288 SHA-256: 6cfa369dc82c1e43211baa5aa481b8cefc14c991f116a1ecab94205aa7c87039
96 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a large number of external links, indicative of a link farm or redirection scheme. The embedded URLs point to various domains, suggesting an attempt to distribute malicious content or manipulate search engine results. No scripts were extracted, but the sheer volume of external links is highly suspicious.

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://tafpremiumseating.org/uploads/1/3/0/8/130814831/130814831.html#tub+grinder+rental+cost
    • http://zerkim.com/uploads/1/3/0/6/130639233/1155038.pdf
    • http://furnishout.com/uploads/1/3/0/9/130969306/f55ce73233.pdf
    • http://khushalishah.net/uploads/1/3/0/8/130874104/pilolodif.pdf
    • http://rupamhomes.ca/uploads/1/3/0/6/130605001/2561313.pdf
    • http://www.mrsbalisalisa.com/uploads/1/3/0/7/130739336/8e5e79918365372.pdf
    • http://mail.buildingblocksplaycenter.com/uploads/1/3/0/5/130545998/saguzed.pdf
    • http://financialmann.com/uploads/1/3/0/6/130603978/b828225d4028.pdf
    • http://blackwoodsounddesign.com/uploads/1/3/0/2/130272586/nezidixu.pdf
    • http://broomsforhire.com/uploads/1/3/0/6/130639948/b409780.pdf
    • http://cc4wdclub.org.au/uploads/1/3/0/3/130323185/mijusa-lorunoxiwu-penixeme-pemimu.pdf
    • http://hookupfoto.com/uploads/1/3/0/4/130489039/404398.pdf
    • http://fwd-momentum.net/uploads/1/3/0/3/130324288/30ef6cd8.pdf
    • http://lpawley.net/uploads/1/3/0/2/130270885/b8bbc0.pdf
    • http://nadowater.com/uploads/1/3/0/4/130435635/betumifule_kedok_xoxekedokep_kejanatak.pdf
    • http://simplyscrumptiousmuffins.com/uploads/1/3/0/5/130539734/lulewova.pdf
    • http://archaeologyofbeing.com/uploads/1/3/0/5/130588573/zugibidupimu-vakogupebije-nipep-tizujemi.pdf
    • http://rationalspirit.org/uploads/1/3/0/5/130588589/3f51a66.pdf
    • http://ns1.oregonadvising.org/uploads/1/3/0/4/130436354/retapukojuvabup.pdf
    • http://portgraal.com/uploads/1/3/0/2/130289760/b0cc6.pdf
    • http://cdbtpsych.com/uploads/1/3/0/6/130605341/pipuzitinaresode.pdf
    • http://loto2019.site/uploads/1/3/0/5/130550976/6421066.pdf
    • http://calebolsen.xyz/uploads/1/3/0/4/130476778/2126404.pdf
    • http://treeoflifecg.com/uploads/1/3/0/9/130969496/raxiluripikatosaxij.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_off00008005.bin
70edb8eef0ceb9fbcaf0c891996d8c211ae01014f0a65b7eb440ef19c38ce7af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8005 7948 bytes

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