Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c84667c60cddf2…

MALICIOUS

PDF

50.4 KB Created: 2020-03-22 10:07:38 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a13b4125daeea0bae1ec4f4b184d68a SHA-1: e6c4de04291c1dc75c1dc503a2735ca1a803cd17 SHA-256: 98c84667c60cddf27441924c75f2ae90bf15cbc34c0124df1eb03fd62c34040c
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm for SEO manipulation or to distribute malicious content. The document body, while containing religious text, also embeds URLs that point to external resources. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

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://nolaporchtalk.com/uploads/1/3/0/7/130776385/130776385.html#la+verdadera+oracion+al+justo+juez+oracion+poderosa
    • http://www.sleukrithmotionpicture.com/uploads/1/3/0/3/130312923/samuv-gusaxapinadom-rotuz-fugalodasobek.pdf
    • http://themelville.net/uploads/1/3/0/6/130604441/viminuli.pdf
    • http://www.pastorkerry.com/uploads/1/3/0/4/130488832/1ab0ee7b9be3a89.pdf
    • http://twistedgraphicsandtees.com/uploads/1/3/0/2/130272278/karojobumazile.pdf
    • http://www.seedorffmasonry.com/uploads/1/3/0/2/130287462/disudepodog_kobip.pdf
    • http://4streets.org/uploads/1/3/0/6/130604368/migirumi.pdf
    • http://activistmkt.co/uploads/1/3/1/0/131070394/559750.pdf
    • http://formationsmarylinetravers.com/uploads/1/3/0/3/130324063/bubabepogapewot.pdf
    • http://jeffnewmanliving.com/uploads/1/3/0/6/130604109/1853782.pdf
    • http://notihit.com.mx/uploads/1/3/0/8/130813055/desolel_nulabagogo_numuxesewures.pdf
    • http://www.delegatelegalsolutions.com/uploads/1/3/0/7/130740437/sebasubi.pdf
    • http://danledesma.com/uploads/1/3/0/6/130604004/gujogi_rimagipesidevi.pdf
    • http://matthewandshawna.com/uploads/1/3/0/5/130550936/lobisa.pdf
    • http://hostmaster.b4biodiversity.co.uk/uploads/1/3/0/3/130313203/pinidafuzetotob.pdf
    • http://thegoodappleyogastudio.com/uploads/1/3/0/6/130620822/6326273.pdf
    • http://tributetowomenmalaysia.com/uploads/1/3/0/5/130588956/xazivuxos.pdf
    • http://www.pinkbatmotorsports.com/uploads/1/3/0/7/130738639/824c947cf1d46.pdf
    • http://coloradobankingcareers.com/uploads/1/3/0/7/130776113/56a7b36acecc66b.pdf
    • http://proctorrbright.com/uploads/1/3/0/5/130588540/8234360.pdf
    • http://www.lauraolivertd.com/uploads/1/3/0/6/130620353/8249735.pdf
    • http://www.ronawall.com/uploads/1/3/0/6/130621897/mapin-kirexefizonokud-lexerenike.pdf
    • http://queencrossdressingacademy.com/uploads/1/3/0/5/130590613/rabirixovunetesut.pdf
    • http://cherylgrayfineart.com/uploads/1/3/0/5/130590297/2404942.pdf
    • http://mfcocksart.com/uploads/1/3/0/6/130620795/vaxaxoz_raseduribuv.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008bba.bin
836d3980f0c338aaea23f8522107403067c50dbf34e8a28e1382392c21693a95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBA 8652 bytes
font_01_sfnt_off0000ab2d.bin
5e431413319f03034aea350b31ee948bcc37103d1963296fb43b1af086d43e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2D 3552 bytes

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