Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0767794ad48a90…

MALICIOUS

PDF

40.1 KB Created: 2020-05-19 16:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ee822468e1fc973ef23341edfc4c3ff SHA-1: 05813a3c30b5968a289be3d70821a32a3e24f0fa SHA-256: 4f0767794ad48a905e1f762fcfb44357c10128ebba181be263e52f4067149a96
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains URLs that are part of this link farm. The primary goal appears to be directing users to a multitude of external sites, likely for malicious purposes such as phishing or malware distribution.

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://inn-serenity.com/uploads/1/3/0/5/130543272/130543272.html#equilibrio+patrimoniale+e+finanziario
    • http://thedouglasscompany.com/uploads/1/3/0/2/130291712/suworefizi_panenebajotewuw_tiponatela.pdf
    • http://lizlaneriwellness.com/uploads/1/3/1/3/131383497/c103dec9084b.pdf
    • http://hopekidsinc.net/uploads/1/3/1/1/131164066/5747035.pdf
    • http://epiclifestylemanagement.com/uploads/1/3/0/3/130379311/wowawodunalanused.pdf
    • http://dietforlifeptyltd.com/uploads/1/3/1/6/131606186/a6bb43b18c81.pdf
    • http://stellakidsyoga.com/uploads/1/3/0/7/130776296/974386.pdf
    • http://experiencevintagechemistry.com/uploads/1/3/0/9/130969673/tumabo-zalupilom.pdf
    • http://rachelllewiliams.com/uploads/1/3/0/3/130379078/c8866.pdf
    • http://hubertspice.com/uploads/1/3/1/4/131406749/tedonepakobom.pdf
    • http://iteachassignment.com/uploads/1/3/0/5/130590416/xifadafivefosuz.pdf
    • http://roxboxgifts.com/uploads/1/3/0/2/130272582/kumojo-nilise-xajuz.pdf
    • http://britishinspirationsllc.com/uploads/1/3/0/2/130271072/94b202092e959.pdf
    • http://rhinocheck.com/uploads/1/3/0/6/130605498/3915527.pdf
    • http://covalentroasters.com/uploads/1/3/0/4/130476370/8bdc0856079.pdf
    • http://fit2servechallenge.com/uploads/1/3/0/9/130969442/8017916.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_off00006993.bin
0b9567b224b5eb7fb29f786411e7365bc181f3c1659cd49ef5b9fbbc670d2887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6993 13400 bytes

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