Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb1f4547be29fd3…

MALICIOUS

PDF

37.9 KB Created: 2020-03-28 08:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e1932c097b5b3a325c40ae1ab35c1709 SHA-1: 9cc9e29a9484f294a1ad91324b702a354ed87666 SHA-256: 9eb1f4547be29fd3c59e9e01e4e1c8f14664f6f53607cf1b7db946056af3ad15
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured as SEO-optimized PDF documents. The document body, though obfuscated, references a product manual, suggesting a lure to drive traffic to these external sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. No scripts were extracted from this sample.

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://morningpeople.club/uploads/1/3/1/3/131383319/131383319.html#midea+instachef+pressure+cooker+manual
    • http://5g-rf.com/uploads/1/3/0/9/130969543/lapilugutosojup.pdf
    • http://www.instegratedcorrosion.com/uploads/1/3/0/8/130873855/7360fa.pdf
    • http://archivetradingcompany.com/uploads/1/3/0/7/130740437/4f7f88da1f3382.pdf
    • http://louer-et-gerer.com/uploads/1/3/0/5/130539672/39e911d5b14594.pdf
    • http://goodriverwellness.com/uploads/1/3/0/5/130542734/8c222f64f0d31.pdf
    • http://baypointvillas.com/uploads/1/3/0/7/130739986/7410768.pdf
    • http://jfiservices.com/uploads/1/3/1/0/131070367/cab5a7f704c7fd.pdf
    • http://www.ecminksluxe.net/uploads/1/3/0/5/130588997/manutategixujumo.pdf
    • http://painfulhipresurfacing.com/uploads/1/3/0/4/130476458/jiwunasugu_xapesalixezuk_wixetesaxaku_fewamudax.pdf
    • http://webmail.mindfulevolution.net/uploads/1/3/0/2/130289741/e103f2d.pdf
    • http://justgreatcareers.com/uploads/1/3/0/5/130544385/4300537.pdf
    • http://anchortechnologies.net/uploads/1/3/0/7/130776674/10d79a6.pdf
    • http://mineviewaero.com/uploads/1/3/0/6/130604425/36c6cb5ef14d566.pdf
    • http://dianebashaw.com/uploads/1/3/0/3/130379959/piwumexekijabudagoj.pdf
    • http://prettyonlocation.com/uploads/1/3/0/4/130483230/2750453.pdf
    • http://www.bandstore.net/uploads/1/3/0/5/130550781/e9a569949d.pdf
    • http://mta-sts.mx.monahanphotog.com/uploads/1/3/0/5/130589019/809987.pdf
    • http://equivally.com/uploads/1/3/0/7/130740292/d45ca4c8.pdf
    • http://lariateers.com/uploads/1/3/0/8/130813132/0456175f89f.pdf
    • http://suburbansubarucrosstrek.com/uploads/1/3/0/6/130620653/4350589.pdf
    • http://johngeneralconstruction.com/uploads/1/3/0/4/130488750/zilapokujafowixe.pdf
    • http://wishforsales.com/uploads/1/3/0/8/130874118/7479921.pdf
    • http://mollybooth.com/uploads/1/3/0/4/130483191/8489280.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b3e.bin
4c0599183ef35718078ca191002e268aabbbae858881d007bcb012fdbae53cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3E 7764 bytes

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