Malicious PDF — malware analysis report

Static analysis result for SHA-256 701f038bee292ca0…

MALICIOUS

PDF

58.0 KB Created: 2020-06-19 10:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17fd82f8c7f7cf1e9aeb6e41756d7c73 SHA-1: fd1516820ed1243779cb12ded56b0d804cabf36e SHA-256: 701f038bee292ca0945ee6a8920b9c10ff92fdf3a467b36ad71f6502f703946a
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links to external websites, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to host or redirect to a link farm. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://alchemystudiosalon.com/uploads/1/3/0/8/130814001/130814001.html#number+line+fraction+worksheet
    • http://efrigon.com/uploads/1/3/0/4/130435988/8296165.pdf
    • http://leylakasimova.art/uploads/1/3/1/4/131453506/zozizanixeb.pdf
    • http://rallyraideng.com/uploads/1/3/0/8/130874433/gamelevivavifamod.pdf
    • http://retaso.com/uploads/1/3/1/4/131437832/8158497.pdf
    • http://74-123-78-179.mgwnet.com/uploads/1/3/0/7/130740207/3398923.pdf
    • http://host42.carmichaelnl.com/uploads/1/3/0/7/130739039/nadigovawekudak-lujimevaw.pdf
    • http://maritimeadvisory.com/uploads/1/3/1/0/131070293/diguzukafetoj.pdf
    • http://hitmanfilms.com/uploads/1/3/0/9/130969580/boxadezekuwin.pdf
    • http://southbendwarehousing.com/uploads/1/3/1/0/131070469/dugopizav-ratogexusemegor.pdf
    • http://yolytorres.com/uploads/1/3/1/4/131453291/680624.pdf
    • http://gloriajanette.com/uploads/1/3/0/4/130476469/fuxamazibazebu-paxezixuxuk-jadojen-wolonor.pdf
    • http://simonssuperiorshine.com/uploads/1/3/0/5/130590710/7980421.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000920b.bin
2ee5aba05b09eab64dfd040e267ca1cccd8a9d1d1d6e8a077b7b218909de3f44
pdf-font-stream PDF embedded font (sfnt) at offset 0x920B 5268 bytes
font_01_sfnt_off0000a3d3.bin
e67a152931393702b4994531f9ef5110faaed133032c2f958bf08e7ef95784c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D3 10036 bytes
font_02_sfnt_off0000c667.bin
de5e424296fca6632de503ebef56d41c9898c13bba2aba3354ff7f3c3578a82d
pdf-font-stream PDF embedded font (sfnt) at offset 0xC667 16116 bytes