Malicious PDF — malware analysis report

Static analysis result for SHA-256 093570e82d1d8b62…

MALICIOUS

PDF

54.6 KB Created: 2020-03-29 13:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d1dd52abda2adda603b40449e58a09c1 SHA-1: a78492e16346263f45e1b15344316690c9d0dc35 SHA-256: 093570e82d1d8b6245177bc0fe93dcbd76ef212e2aea8f42ce76dc8d1ab08240
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. The embedded URLs point to various domains, many of which appear to be part of this link farm. No scripts were extracted, but the presence of numerous external links indicates a likely attempt to lead the user to a malicious second-stage resource.

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://74-123-77-90.mgwnet.com/uploads/1/3/1/4/131406207/131406207.html#4+basic+elements+of+poetry
    • http://eatdoughp.com/uploads/1/3/0/6/130605228/7910809.pdf
    • http://verdenaturalproducts.com/uploads/1/3/0/5/130590717/5527598.pdf
    • http://joyfulencounters.com/uploads/1/3/0/6/130620968/994b71.pdf
    • http://k9clobber.com/uploads/1/3/0/7/130739532/727886.pdf
    • http://eventosibm.com/uploads/1/3/0/7/130775583/gezuzunape-vufixofepa-dibor-rosovezotawav.pdf
    • http://mountainreveriemassage.com/uploads/1/3/0/5/130551266/a136f26.pdf
    • http://etechsolutions.info/uploads/1/3/0/6/130604765/6228349.pdf
    • http://kimprintzcustoms.com/uploads/1/3/0/6/130604730/cd1ec59158df37.pdf
    • http://dentaldc.org/uploads/1/3/1/1/131163793/jozaselufo-letesogidugoxid-bujatagofo-wakusawobed.pdf
    • http://amarillocollegemusic.com/uploads/1/3/0/5/130545429/ximamumij.pdf
    • http://ashevillefdhistory.org/uploads/1/3/0/2/130272613/7375982.pdf
    • http://bcreativedesignandservices.com/uploads/1/3/0/6/130621620/punetonanaju-ginapobiliw-zabuwu.pdf
    • http://justmonkeybizness.com/uploads/1/3/0/5/130544090/2162971.pdf
    • http://acelerabrazil.com/uploads/1/3/0/5/130539297/benudobati-nepamajokaxil-rusodirejo-mojokonidumisa.pdf
    • http://tea-juan.com/uploads/1/3/0/4/130483848/finuduz.pdf
    • http://amininger-copywriter.com/uploads/1/3/0/3/130379357/bilelojabavimuvo.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_off0000a9fb.bin
8f6f702463e0c7d20d12a233a591326aeda3fa5cb939f7771fd89eeef1d45380		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9FB 8800 bytes

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