Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebff005bb0925878…

MALICIOUS

PDF

33.9 KB Created: 2020-06-05 20:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 076193d6f0f5e956a02bee93f3370bbd SHA-1: 0ed3bd84cd5062d71310b9a77e8d3e4546ebe752 SHA-256: ebff005bb09258785705690aa28ce64b1d13ad5beda349e32b8e576d70954db9
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to other PDF files hosted on unrelated domains. The document body, though partially corrupted, includes references to a 'Panasonic kx-t7730 user manual' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, a common tactic for SEO poisoning or distributing malicious content. The ML classifier strongly flagged this PDF as malicious.

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://xualiapp.com/uploads/1/3/1/6/131607544/131607544.html#panasonic+kx-t7730+user+manual PDF link annotation
    • http://cotebrotherslawncare.com/uploads/1/3/1/4/131437660/981aa728abd5e.pdfIn PDF document text
    • http://maintainmotion.net/uploads/1/3/0/7/130776267/12a499ebd1.pdfIn PDF document text
    • http://solutionsbyjo.com/uploads/1/3/1/4/131407377/xaruzu.pdfIn PDF document text
    • http://letstalksecret.com/uploads/1/3/1/3/131398447/wigagikixuguwupebi.pdfIn PDF document text
    • http://anathemamaranatha.com/uploads/1/3/1/1/131164534/7763418.pdfIn PDF document text
    • http://xualiapp.com/uploads/1/3/1/6/131607544/terms.htmlIn PDF document text
    • http://xualiapp.com/uploads/1/3/1/6/131607544/dmca.htmlIn PDF document text
    • http://xualiapp.com/uploads/1/3/1/6/131607544/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://subigeda.files.wordpress.com/2020/06/xaponeza.pdfIn PDF document text
    • https://pudagul.files.wordpress.com/2020/06/tewir.pdfIn PDF document text
    • https://wedigari.files.wordpress.com/2020/06/xifokapoledojomukapedaso.pdfIn PDF document text
    • https://semijex.files.wordpress.com/2020/06/56331168765.pdfIn PDF document text
    • https://gotexutag798502486.files.wordpress.com/2020/06/kanuzapuwozumigez.pdfIn PDF document text
    • https://botemep98974298.files.wordpress.com/2020/06/sigivawamoxusumifop.pdfIn PDF document text
    • https://sowozegoji.files.wordpress.com/2020/06/bezejubevulokanukuxigagi.pdfIn PDF document text
    • https://xovupizi.files.wordpress.com/2020/06/luletol.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

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_off00005678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5678 11164 bytes
SHA-256: b98e739e0b16967f5a45939e34cc00850f8de14763a4727f80b85bbb50424e4e

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