Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22c814e1a94964f…

MALICIOUS

PDF

49.6 KB Created: 2020-03-20 14:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 875105b4fae925649a5b5604c755ec19 SHA-1: 82b0b44109f712386582fcd6a7dae9a280813cef SHA-256: a22c814e1a94964faa755696d3d25ff4150292f7821d90b1c9d9236c7fcb6c92
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body text, though partially corrupted, contains keywords like 'christmas stocking pattern free' and references to the wkhtmltopdf tool, suggesting a lure to unrelated content. The primary heuristic firing indicates a 'PDF_SEO_LINK_FARM' with 30 external links, predominantly hosted on domains like normacowie.ca, pointing towards a link-building or redirection scheme.

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://insureapplewatch.com/uploads/1/3/0/5/130550936/130550936.html#mccalls+christmas+stocking+pattern+free PDF link annotation
    • http://normacowie.ca/uploads/1/3/0/5/130551324/d5d07.pdfIn PDF document text
    • http://bowdoinexcavation.com/uploads/1/3/0/6/130640048/juxabid.pdfIn PDF document text
    • http://cvsports.org/uploads/1/3/0/2/130270762/wisuxodewiw_bafewon_lupuvanobipel.pdfIn PDF document text
    • http://www.gawooddesign.com/uploads/1/3/0/5/130541597/12319.pdfIn PDF document text
    • http://kingleekrepairshop.com/uploads/1/3/0/4/130488446/tekulo-sobaresiraja-vejep.pdfIn PDF document text
    • http://visionary-affairs.com/uploads/1/3/0/5/130540928/6486158.pdfIn PDF document text
    • http://www.plussizeweddingdressesvt.com/uploads/1/3/0/2/130291784/69e5dce.pdfIn PDF document text
    • http://morganisalive.com/uploads/1/3/0/7/130776449/patowegilos-sefejafosuj-damibusanadu-vegoriboni.pdfIn PDF document text
    • http://autodiscover.edgecombebrothers.com.au/uploads/1/3/0/6/130621937/zofinomevopegi-xavenexigaje.pdfIn PDF document text
    • http://informacionyturismo.net/uploads/1/3/0/6/130639931/wubafekozola.pdfIn PDF document text
    • http://foodtogove.com/uploads/1/3/0/6/130639283/9c495.pdfIn PDF document text
    • http://sayorale.org/uploads/1/3/0/5/130588506/mazatenezoj_bezegujabalagov.pdfIn PDF document text
    • http://frugalmix.com/uploads/1/3/0/6/130621620/365037.pdfIn PDF document text
    • http://finishings.ca/uploads/1/3/0/6/130621388/vesixur.pdfIn PDF document text
    • http://capricornwelding.com/uploads/1/3/0/5/130545421/3666956.pdfIn PDF document text
    • http://bluffcreekfarmsbedandbreakfast.com/uploads/1/3/0/6/130620902/megiwog-kolisisasibe-zaxutuvagu-lidunugivekaka.pdfIn PDF document text
    • http://pornabl.com/uploads/1/3/0/6/130603983/2738282.pdfIn PDF document text
    • http://vidalytics.net/uploads/1/3/0/6/130639725/zaziwelukimozox.pdfIn PDF document text
    • http://sovereignfoodie.com/uploads/1/3/0/5/130545565/sojadanuxinexa.pdfIn PDF document text
    • http://newyearnourishment.com/uploads/1/3/0/6/130620451/nifolufef.pdfIn PDF document text
    • http://swordstudycollective.ca/uploads/1/3/0/6/130622110/nepidofofi-varapasek-xutajuturul-nurufam.pdfIn PDF document text
    • http://fracturedoptics.com/uploads/1/3/0/5/130588827/778c0.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E97 9440 bytes
SHA-256: cf5c4d1122ca4e366b55878fead65054f4e7d3ce4abe128c6779ef79d24c7e29
font_01_sfnt_off0000a1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E0 16036 bytes
SHA-256: ddc6c38a5929b263b215a5b0c7aa8b1a409f146866f06980111f9f21a6232bf4

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