Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7aacb0a33f9060…

MALICIOUS

PDF

43.0 KB Created: 2020-03-19 08:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: db45eb1598dc55d410a40d6a2d11088c SHA-1: 02f59e83852f8b594c137693e6647955a3dfa5dc SHA-256: ee7aacb0a33f90601c7f6b786a8bab7e0c1886080040f040060611eefa20a199
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files across numerous domains. The ML_NYX_PDF_MALICIOUS classifier also strongly indicated maliciousness. The document body text is largely unreadable due to encoding issues but contains a title related to cultural reproduction theory, which is likely a lure. The primary attack pattern involves directing users to a link farm, potentially for SEO spam or to host further malicious content.

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://michaelhiggins.ie/uploads/1/3/0/7/130739332/130739332.html#de+que+trata+la+teoria+de+la+reproduccion+cultural
    • http://www.hongkongdanceproductionhk.com/uploads/1/3/0/6/130605339/netepatulij_fuwukimerux.pdf
    • http://www.1astprints.com/uploads/1/3/0/6/130604307/7160945.pdf
    • http://backes-olli.com/uploads/1/3/0/4/130493714/kopumulazab.pdf
    • http://gregoryfanning.com/uploads/1/3/0/5/130540453/jenujuwisel_duvisabisedam.pdf
    • http://www.goldenpompuppies.com/uploads/1/3/0/5/130539846/361397.pdf
    • http://oldflamesoycandles.com/uploads/1/3/0/2/130273624/1976175.pdf
    • http://boutiqueinsolite.com/uploads/1/3/0/7/130775076/3428048.pdf
    • http://mindbodymend.com.au/uploads/1/3/0/7/130738943/wulolaruvejo.pdf
    • http://bn0tr.bpmtc.com/uploads/1/3/1/0/131070992/1855491.pdf
    • http://adrianmusic.net/uploads/1/3/0/3/130313319/temitulimefam-bofusif-rebolejufav-zexolifego.pdf
    • http://adyoga.ca/uploads/1/3/0/7/130738837/1a0873.pdf
    • http://boni4judge.com/uploads/1/3/0/6/130621110/womurujari_dodix_badezozawe.pdf
    • http://stevenrobinsonmusic.com/uploads/1/3/0/3/130379074/5012eef9f2ee.pdf
    • http://mx.nookandcrannyorganizing.com/uploads/1/3/0/5/130551677/7d6845.pdf
    • http://digidostudios.com/uploads/1/3/0/5/130540046/xawam_nubixe_duzegujatozusex_jiseratasaxemu.pdf
    • http://www.dejadefumar.es/uploads/1/3/0/2/130289480/6147966.pdf
    • http://agcomllc.net/uploads/1/3/0/3/130313117/24be6833c6a.pdf
    • http://drmegangomez.com/uploads/1/3/0/4/130488833/rapimujot-ruzebomorivo.pdf
    • http://warrentavern.us/uploads/1/3/0/6/130604416/lunetukesex.pdf
    • http://www.gailsuberbiellephotography.shop/uploads/1/3/0/7/130775997/2477210.pdf
    • http://rockymountainpsych.org/uploads/1/3/0/4/130478648/bexutakebo_viduzowaluzija.pdf
    • http://toppicksconsignment.com/uploads/1/3/0/6/130640084/notokegafine.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_off00007d46.bin
c825aa4b931848c28907a41a25855d6d574030625bed5b3250990cccd888bfcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D46 8472 bytes

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