Malicious PDF — malware analysis report

Static analysis result for SHA-256 005fba5005c5981c…

MALICIOUS

PDF

44.0 KB Created: 2020-03-29 08:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5b2938c15bc9b7ddb3d5ce09f659cfdf SHA-1: 2f42224b76dedd4aa5410a68bb0195387d257c4d SHA-256: 005fba5005c5981c0c83f89458ac95b00a0d15fbfec7c551089b028de7fd00dc
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary external URI points to 'http://northernrailleaders.com/uploads/1/3/0/8/130874474/130874474.html#sistema+analitico+y+perpetuo+pdf', which is part of a link farm strategy. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated.

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://northernrailleaders.com/uploads/1/3/0/8/130874474/130874474.html#sistema+analitico+y+perpetuo+pdf
    • http://www.azmendinglives.com/uploads/1/3/0/7/130775682/f25e046b0cb9fc3.pdf
    • http://montanalandscapingm.com/uploads/1/3/0/6/130604348/1131543.pdf
    • http://www.ampscollegecorner.com/uploads/1/3/0/7/130740143/paxuw.pdf
    • http://oregonbca.com/uploads/1/3/0/6/130640040/3118110.pdf
    • http://precisionimprint.net/uploads/1/3/0/7/130776516/72b141f1be9b72a.pdf
    • http://himaliano.com/uploads/1/3/0/7/130775365/c13ead71f39c8.pdf
    • http://www.masslawns.com/uploads/1/3/0/7/130740048/8d53ec34b.pdf
    • http://jennifermstuart.com/uploads/1/3/0/4/130476308/titofosabuvutoxomu.pdf
    • http://www.flagshipcommre.com/uploads/1/3/0/4/130478935/9294391.pdf
    • http://www.pmifox.net/uploads/1/3/0/7/130776609/povudapigo_ligavat.pdf
    • http://cunningham-exonumia.com/uploads/1/3/0/3/130313632/9695456.pdf
    • http://sheilastonephotographer.com/uploads/1/3/0/3/130379228/628670.pdf
    • http://comfydent.com/uploads/1/3/0/5/130589020/lusupuba.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ced.bin
b3a4100693316382c06e43d5d40ec63a050733d5bc207bfd6c0fa05ac0a301b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CED 8532 bytes
font_01_sfnt_off00008c37.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C37 16036 bytes

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