Malicious PDF — malware analysis report

Static analysis result for SHA-256 825218c2d7f25f3c…

MALICIOUS

PDF

42.4 KB Created: 2020-04-03 08:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0999dd88301b775643f9b65edf1045b6 SHA-1: 57fbf1d86f5a043084d5c8b4099b7bd5080c46ff SHA-256: 825218c2d7f25f3c99afdd3607ba4e563e1551ce60acdfe6429f2fca60884897
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique commonly used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains a title related to Mesoamerican culture, suggesting a lure to entice users to click on the embedded links.

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://stopeurocide.com/uploads/1/3/0/4/130488451/130488451.html#cuales+fueron+sus+aportaciones+culturales+de+mesoamerica
    • http://www.newelementkc.com/uploads/1/3/0/6/130639626/binixikinivek.pdf
    • http://yozone.org/uploads/1/3/0/7/130739457/2005072.pdf
    • http://homesafeenvironmental.com/uploads/1/3/0/6/130639215/nejomegikuzira-xivede-tovew.pdf
    • http://darmofarm.com/uploads/1/3/0/9/130968943/votonaludidek.pdf
    • http://jlmengenhariaeletrica.com/uploads/1/3/0/7/130740113/3982144.pdf
    • http://acafeend.com/uploads/1/3/0/5/130545698/zedutasunitisiv.pdf
    • http://catherinegreer.com/uploads/1/3/0/7/130776504/runedad_fifebiletiw_luzeri_wadoxoragaxa.pdf
    • http://entrepreneursupportgroup.org/uploads/1/3/0/6/130639941/puparorovovudika.pdf
    • http://alexwoodsoutdoors.com/uploads/1/3/0/5/130588701/2078363.pdf
    • http://chopsticksfortwo.com/uploads/1/3/0/6/130603835/9d88cd1eef47.pdf
    • http://littleexplorerspreschool123.com/uploads/1/3/0/9/130969944/2940458.pdf
    • http://digitronicentertainment.com/uploads/1/3/0/2/130289311/14c86.pdf
    • http://deptmltd.com/uploads/1/3/0/5/130538986/33441c4943.pdf
    • http://earthboundblackbird.com/uploads/1/3/0/6/130621545/duvezagagix.pdf
    • http://jungermanfoundation.org/uploads/1/3/0/8/130874529/kuzizapajizifimi.pdf
    • http://cottonwoodequineresort.com/uploads/1/3/0/8/130874258/kofibubitus.pdf
    • http://liebich-liebich.com/uploads/1/3/0/2/130292073/dubewaxo-kujiwaw.pdf
    • http://embodiedmotherhood.com/uploads/1/3/0/5/130540116/sodejuzozufivobidet.pdf
    • http://moonshinemeadowsminifarm.com/uploads/1/3/0/6/130639400/9344223.pdf
    • http://silverlinefabrication.com/uploads/1/3/1/4/131438207/telibara.pdf
    • http://sudapics.net/uploads/1/3/0/5/130590126/2476145.pdf
    • http://solutionholdings.com/uploads/1/3/0/4/130488387/2962806.pdf
    • http://rgtrades.net/uploads/1/3/0/5/130543418/fojit.pdf
    • http://meghanngilles.com/uploads/1/3/1/3/131382248/3175024.pdf
    • http://rgtrades.net/uploads/1/3/0/5/130543418/fojit
    • 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_off00007b18.bin
8ca10e0346ae8129f83e5cf300f0fd3ac3ea2c44101d2a1c2e0c09acac6bb2a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B18 8368 bytes

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