Malicious PDF — malware analysis report

Static analysis result for SHA-256 96498b0894121aa1…

MALICIOUS

PDF

37.4 KB Created: 2020-03-12 03:10:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 35fb71564877161297d6a5f3519f55cb SHA-1: b342635efedf71a52b883779d0d427c0ab2a38f9 SHA-256: 96498b0894121aa19f894a9ebbb4241c366951dbb35604f00a81621d960106f3
104 Risk Score

Malware Insights

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

The PDF document contains a lure for a free PDF reader download, which is a common social engineering tactic. It also exhibits a PDF link farm heuristic, indicating the generation of numerous SEO-optimized PDF links, likely to distribute malicious content or engage in click fraud. The presence of multiple external URLs, many with numeric slugs, reinforces the SEO link farm pattern. No scripts were extracted, but the overall structure suggests a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://joyofphysics.com/uploads/1/3/0/2/130273872/130273872.html#pdf+reader+free+download+latest+version+for+windows+7+free PDF link annotation
    • http://www.scheibnerbautista.com/uploads/1/3/0/7/130738503/7450691.pdfIn PDF document text
    • http://rankfirstsocialmediamarketing.com/uploads/1/3/0/2/130273893/wopusujowenibaja.pdfIn PDF document text
    • http://threelittlebirdsshop.com/uploads/1/3/0/5/130551727/gupaxop.pdfIn PDF document text
    • http://candidates.ccsps.info/uploads/1/3/0/5/130545128/3d924ed873f69b5.pdfIn PDF document text
    • http://www.redzebraclothing.co.uk/uploads/1/3/0/7/130775231/kunejavofepe-bikadigujosakig-wizanubovofed-viwemite.pdfIn PDF document text
    • http://www.maelasesethics.com/uploads/1/3/0/5/130588980/zepupuwawub_lorepewol_luruxi.pdfIn PDF document text
    • http://www.deatonartsllc.com/uploads/1/3/0/5/130539074/xepatepidurusokepos.pdfIn PDF document text
    • http://tbtaekwondo.com/uploads/1/3/0/3/130323374/sukevo.pdfIn PDF document text
    • http://www.meadowvalleywedding.com/uploads/1/3/0/5/130589249/jinedafif-nusuboxogaso.pdfIn PDF document text
    • http://swiftascentmarketing.com/uploads/1/3/0/2/130272291/4346321.pdfIn PDF document text
    • http://stlopenwater.com/uploads/1/3/0/7/130739068/a09e5eacd04.pdfIn PDF document text
    • http://silverbirchescamp.com/uploads/1/3/0/5/130551162/jejag-wisuful.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_off000067f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F2 7744 bytes
SHA-256: 7c88b79560e68d294b6644c85d519408f29e32486129ea1b6839ff7cfa145da8

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