Malicious PDF — malware analysis report

Static analysis result for SHA-256 717a7f3076f43e35…

MALICIOUS

PDF

44.0 KB Created: 2020-04-06 10:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c3ec80027c701300e8cbb8d23d075ac0 SHA-1: 6170dbd1f8849823796ff466797735faf7a92aef SHA-256: 717a7f3076f43e3578f6a15976fe096bf294982cd04c73c7316f6a9830191aa4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains references to 'Adobe CS6 mac amtlib.framework' and multiple URLs, indicating a likely attempt to redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to potentially harmful 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://baylandesign.net/uploads/1/3/1/1/131164249/131164249.html#adobe+cs6+mac+amtlib.framework
    • http://evolutionofevolving.ca/uploads/1/3/0/6/130604351/gosodujosu.pdf
    • http://lereveildesetoiles.com/uploads/1/3/0/2/130272462/22510cfe22f7.pdf
    • http://tiffanyspetservices.com/uploads/1/3/0/3/130323421/migujiramapixokopak.pdf
    • http://nmroberts.org/uploads/1/3/0/2/130291489/tiligelugakemiwa.pdf
    • http://kitsonschuyler.com/uploads/1/3/1/3/131381363/xegosetipuvekamak.pdf
    • http://jsic.eu/uploads/1/3/0/2/130291485/9016107.pdf
    • http://realloveisunbreakable.org/uploads/1/3/0/5/130588251/3517986.pdf
    • http://trendhomestaging.net/uploads/1/3/0/7/130740175/bazatavojejizamalasi.pdf
    • http://interdisciplinaryfamilyjusticeassociation-sv.com/uploads/1/3/0/5/130550995/bifuwapedu_kituvabe_zuwelabamos.pdf
    • http://delaneymcguire.com/uploads/1/3/0/5/130589214/ad74d14.pdf
    • http://bemytravelguy.com/uploads/1/3/0/8/130874222/fd352e8b83f410.pdf
    • http://bethelchurchlife.com/uploads/1/3/0/6/130622029/2653571.pdf
    • http://timothysmithactor.com/uploads/1/3/0/7/130775965/8a9f15f9.pdf
    • http://soundsforstudying.net/uploads/1/3/0/6/130621225/f52e25b2.pdf
    • http://wickesinstitute.com/uploads/1/3/0/3/130313700/rileguxuliw_nijizexanulakod.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_off00006e72.bin
882a4afc22ccf1547b5ad8a2b41338ae4d9c8e9c2ca8eb4d9fb388221a545ded
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E72 8280 bytes
font_01_sfnt_off00008e43.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E43 16036 bytes