Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30694234e09f003…

MALICIOUS

PDF

37.1 KB Created: 2020-06-16 14:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 5b76454bbceb91f81437f94af713ae73 SHA-1: 853e174e989cfb4bf52f387f3d4899bdd6073847 SHA-256: d30694234e09f003b8d0aa9d3bcde311b095561046d3c11a68d38f26742db8af
96 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body itself is largely unreadable, but the presence of URLs indicates a likely attempt to redirect the user to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://matthewblocker.com/uploads/1/3/0/5/130542758/130542758.html#pdf+of+marketing+management PDF link annotation
    • http://mrjudd.com/uploads/1/3/0/8/130813841/toxewaxugopuxos_dadaxopur.pdfIn PDF document text
    • http://treeremovaltampa.com/uploads/1/3/0/7/130740502/3056345.pdfIn PDF document text
    • http://mta-sts.mx.dogsltdtraining.com/uploads/1/3/0/5/130543063/7169053.pdfIn PDF document text
    • http://webdisk.fca-oregon.org/uploads/1/3/0/2/130271217/4831925.pdfIn PDF document text
    • http://maggiewarwick.co.uk/uploads/1/3/1/8/131858287/vixexe_mekemet.pdfIn PDF document text
    • http://vpn.laurelmedpa.com/uploads/1/3/0/4/130479008/sexuvamuboveja.pdfIn PDF document text
    • http://2beta.eu/uploads/1/3/1/4/131437792/wuzuzobumop_wudutofebovuvud_tukepetagus_jibagazad.pdfIn PDF document text
    • http://staging6.tnhempfarmacy.com/uploads/1/3/0/7/130775536/togejavumameviminux.pdfIn PDF document text
    • http://learnatschool.com/uploads/1/3/1/6/131637009/sekixadidilonek-guxukirobowu-wenerija.pdfIn PDF document text
    • http://kuzhanov.org/uploads/1/3/1/6/131606365/rawuzuvuf-jemukipadiv.pdfIn PDF document text
    • http://mail.crushthemarket.com/uploads/1/3/0/2/130289189/933c2575bdacd7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000623b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 11064 bytes
SHA-256: 8bb82f3eb9d60febb1fa448a2e5c5ba13ca0f2bde193ead6fab8e9e36d4d5426