Malicious PDF — malware analysis report

Static analysis result for SHA-256 8159c65db285fbc1…

MALICIOUS

PDF

39.4 KB Created: 2020-03-23 09:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: d7c1298e49972dbeab5015130cbe257a SHA-1: c8dfad664eed8392229e10bb556494417326bc22 SHA-256: 8159c65db285fbc1352ed1b8cb9704f7ee0cf2420ffc930c854d3c5afa8ccfb1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, which are likely intended to redirect users to malicious websites. The document body, though partially corrupted, contains a URL related to resetting a Samsung soundbar, suggesting a lure to disguise the malicious intent. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is part of a campaign to distribute malware or phish users.

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://jamiefehr.com/uploads/1/3/1/1/131163601/131163601.html#how+to+reset+samsung+soundbar+hw-f450 PDF link annotation
    • http://jhillphotography.us/uploads/1/3/0/9/130969595/5294f5.pdfIn PDF document text
    • http://servantfriendsministriesco.org/uploads/1/3/0/7/130775859/litipe.pdfIn PDF document text
    • http://mrsmorones.com/uploads/1/3/0/5/130543168/paxiraruduwixid_fagapoxexu_lukase.pdfIn PDF document text
    • http://firstrepublicbankcareers.com/uploads/1/3/0/5/130545185/bonolikafilulez_mobilat_tanezatunomami.pdfIn PDF document text
    • http://www.jonsmithsubsandover.com/uploads/1/3/0/5/130541116/kugudimok.pdfIn PDF document text
    • http://thefivemilliondollarbook.stefanaarnio.com/uploads/1/3/0/5/130588529/da6302.pdfIn PDF document text
    • http://comemorandoavida.com/uploads/1/3/0/4/130436390/565089.pdfIn PDF document text
    • http://timebtime.com/uploads/1/3/0/5/130588786/8736466.pdfIn PDF document text
    • http://ats.tylersharris.com/uploads/1/3/0/6/130620928/buxigiwek.pdfIn PDF document text
    • http://flatlandultrarunner.net/uploads/1/3/0/6/130620759/41751db4.pdfIn PDF document text
    • http://cpanel.bhutanmindfultravels.com/uploads/1/3/0/5/130539440/79b4c298.pdfIn PDF document text
    • http://estudiodiseno14.com/uploads/1/3/0/8/130814337/bozovajopizizisari.pdfIn PDF document text
    • http://jetsetretail.net/uploads/1/3/0/9/130969062/vazuxipezixadudimuga.pdfIn PDF document text
    • http://hostmaster.simon-bischof.ch/uploads/1/3/0/4/130488975/6741100.pdfIn PDF document text
    • http://epichroniconline.com/uploads/1/3/0/7/130739561/795941.pdfIn PDF document text
    • http://toptierpublishing.com/uploads/1/3/0/7/130775196/6995841.pdfIn PDF document text
    • http://kingdomfaithandrevelation.org/uploads/1/3/1/0/131071038/6645925.pdfIn 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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F81 7900 bytes
SHA-256: 2cc958635cf0a5349461064ef12a82cd7fb0e0e4b5c01affcf8b6523eb8d2f04

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