Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a03defa6546a99e…

MALICIOUS

PDF

40.1 KB Created: 2020-03-31 21:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: bb9b09e2a1e7be64b5e531ecb1d3da53 SHA-1: ae2a4ff68a80683d9154ddf09e310b566b971fbc SHA-256: 3a03defa6546a99e3456c279c073bd27fcb14a18f9c06dc42ab8bd50a391be5b
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 ebook, which is a common social engineering tactic. It embeds a large number of external links, many pointing to other PDF files, suggesting a link farm or a distribution mechanism for further malicious content. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious intent, with the dominant host being 'roseblhair.com'. No scripts were extracted from this sample.

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://heretotherecampaign.org/uploads/1/3/0/6/130639551/130639551.html#introduction+to+nanoscience+and+nanotechnology+ebook+free+download PDF link annotation
    • http://roseblhair.com/uploads/1/3/0/6/130605159/dasodalipugenodu.pdfIn PDF document text
    • http://mynoonu.com/uploads/1/3/0/5/130588551/bavabemu.pdfIn PDF document text
    • http://artofsanctuary.com/uploads/1/3/0/3/130324191/56018.pdfIn PDF document text
    • http://perfectlyimperfectdesignsbyri.com/uploads/1/3/0/6/130640091/bapukifafuwoz.pdfIn PDF document text
    • http://ladybound.org/uploads/1/3/0/6/130604259/girem.pdfIn PDF document text
    • http://redlineforex.com/uploads/1/3/0/6/130621413/dcb6c4387ba9543.pdfIn PDF document text
    • http://buckmanpdx.com/uploads/1/3/0/2/130291536/wokuf-kadip-nazufeza.pdfIn PDF document text
    • http://kypropertyventureinvestmentllc.com/uploads/1/3/0/8/130813429/668f734b7c.pdfIn PDF document text
    • http://bourioanatoliesfilms.com/uploads/1/3/0/6/130639865/1721789.pdfIn PDF document text
    • http://gemmaloomans.com/uploads/1/3/0/7/130738603/4771683.pdfIn PDF document text
    • http://balconesheightstreeservice.com/uploads/1/3/0/5/130551401/tokuwutuve.pdfIn PDF document text
    • http://quiltstudies.com/uploads/1/3/0/8/130874393/eccbc7769430.pdfIn PDF document text
    • http://twtechnologyservices.com/uploads/1/3/0/6/130603867/7e8032bbd.pdfIn PDF document text
    • http://suk-ram.com/uploads/1/3/0/7/130776205/veluw.pdfIn PDF document text
    • http://palmaconstructioncorp.com/uploads/1/3/0/3/130323603/nomevujerutuni_kodepodop.pdfIn PDF document text
    • http://vancityhandymanservices.com/uploads/1/3/1/0/131070771/6088818.pdfIn PDF document text
    • http://imaginethat-3dprinting.net/uploads/1/3/0/5/130540472/kotujurod_suzujutigif_jujupimowexi_rejapetefalivuw.pdfIn PDF document text
    • http://smokeytrout.com/uploads/1/3/0/6/130639672/satumegoze_bulexen_gibatelegobig.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 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_off0000741c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x741C 7844 bytes
SHA-256: 72e8a23bbfaf2619f83ca1b5b6f65c04655cd556de27c5057309751f4e8acb9c

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