Malicious PDF — malware analysis report

Static analysis result for SHA-256 113d1a82d5e30d2a…

MALICIOUS

PDF

55.3 KB Created: 2020-04-18 00:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 64cda76e8dc5bcb20bf1d2f2aff1a68f SHA-1: 899f337ce2abca3f4ef69e02f91a9313afb0d8c8 SHA-256: 113d1a82d5e30d2a266a6a76c258d1ed070f91df90fcdfa96d211a32653aa750
104 Risk Score

Malware Insights

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

This PDF document contains numerous links to external PDF files, suggesting a link farm or SEO abuse tactic. One prominent URL, http://globaly.shop/uploads/1/3/0/5/130540795/130540795.html#messenger+mod+apk+black, indicates a lure for downloading a modified APK, likely for malicious purposes. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://globaly.shop/uploads/1/3/0/5/130540795/130540795.html#messenger+mod+apk+black
    • http://mfglobe.com/uploads/1/3/0/4/130494059/9f10f0a0c9f586.pdf
    • http://set4therapy.net/uploads/1/3/0/3/130313307/rusegedaxixilojir.pdf
    • http://dryeyestl.com/uploads/1/3/1/4/131482963/pebojexulosugap-lazigipab-dilakugajatamej-munawovur.pdf
    • http://uniquecareservices.net/uploads/1/3/1/3/131379049/847666.pdf
    • http://ahrens.studio/uploads/1/3/0/7/130738658/2256378.pdf
    • http://hardwatertreatments.com/uploads/1/3/0/7/130738754/kuwilozu.pdf
    • http://lifeofcheer.com/uploads/1/3/0/2/130274322/liruremigipegoj-dituvovanusa-biluzulageb.pdf
    • http://belikebrian.org/uploads/1/3/0/5/130542924/rasope_gorokewim.pdf
    • http://jhl-consulting.de/uploads/1/3/0/5/130542972/jinidebibewoxutoni.pdf
    • http://babyboot.com.au/uploads/1/3/0/5/130588468/pamazoweku.pdf
    • http://wicker-media.com/uploads/1/3/0/3/130312937/rewaxibule.pdf
    • http://janettaylor.ca/uploads/1/3/1/3/131383681/80590890c6e7.pdf
    • http://girlcavellc.com/uploads/1/3/1/4/131453927/6518310.pdf
    • http://theheadagency.com/uploads/1/3/0/2/130289478/wikopewe-puzibosugamafav.pdf
    • http://lupinefilms999.com/uploads/1/3/1/3/131381048/bd54aa291.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
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f7d.bin
0ae7486bc62ce5df6e9f1300401a2c2455d9ac237f010a92d95f592dfe35e7a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7D 9300 bytes
font_01_sfnt_off0000a101.bin
f7ae235e65292b2d757bd2a8dcefc616e90da7b3ed2a0b8a3837f3a53b457560		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA101 16284 bytes
font_02_sfnt_off0000b687.bin
d1dfa7b2be3b1689ce08053d7732f97f330b93afe01b0e083efcb25f8d5e5194		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB687 8704 bytes

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