Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb747a8b91875b6…

MALICIOUS

PDF

44.0 KB Created: 2020-03-16 15:18:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b5bac29d2a7c029ee99a0f34e8f464e6 SHA-1: 0f71cee08299d794aa8fa43cddec2fa4b829abde SHA-256: dbb747a8b91875b68483179145bdc5394c0256286219634cf9e676460932b3fd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. The document body contains obfuscated text and references to external URLs, suggesting a link farm or redirection scheme. 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://hostmaster.polarityzug.ch/uploads/1/3/0/5/130588269/130588269.html#death+of+the+moth+virginia+woolf+pdf PDF link annotation
    • http://blanchardstevens.com/uploads/1/3/0/6/130640175/zerevadipisedo-fozebolewomez-govukuwamawoxas.pdfIn PDF document text
    • http://www.kentaur.com.tw/uploads/1/3/0/5/130539408/6418969.pdfIn PDF document text
    • http://trashintransit.com/uploads/1/3/0/7/130739256/bunaj.pdfIn PDF document text
    • http://www.hoofmanship.com/uploads/1/3/0/4/130478261/afaf82e.pdfIn PDF document text
    • http://rockofoakland.com/uploads/1/3/0/5/130589218/tubuvane_tedof_nukudomasukorit.pdfIn PDF document text
    • http://sparksnewstoday.com/uploads/1/3/0/6/130639514/3484974.pdfIn PDF document text
    • http://raisedeadpeople.com/uploads/1/3/0/2/130287521/14d617850f92d37.pdfIn PDF document text
    • http://www.fairview-holidays.com/uploads/1/3/0/6/130604449/a9ef577.pdfIn PDF document text
    • http://bali-immo-villa.com/uploads/1/3/0/5/130551375/dokut_tarirad_vezinariral_peverux.pdfIn PDF document text
    • http://mobilbar.de/uploads/1/3/0/9/130970015/3858111.pdfIn PDF document text
    • http://2003ebaenglandscotlandtrip.com/uploads/1/3/0/5/130543874/b001f38c8d.pdfIn PDF document text
    • http://www.rednosealliance.org/uploads/1/3/0/5/130589373/4693782.pdfIn PDF document text
    • http://musicmash.ca/uploads/1/3/0/6/130604892/501695.pdfIn PDF document text
    • http://moorewalkinghorses.com/uploads/1/3/0/4/130475990/jufojugubavulabaw.pdfIn PDF document text
    • http://fourseasonspoolsspas.com/uploads/1/3/0/5/130550903/denem.pdfIn PDF document text
    • http://www.kaleidotheatre.com/uploads/1/3/0/5/130539095/9225856.pdfIn PDF document text
    • http://goldenharvestbakery.com/uploads/1/3/0/7/130776072/linerekefibew.pdfIn PDF document text
    • http://www.1444harrison.com/uploads/1/3/0/6/130604579/97d0b9c47c.pdfIn PDF document text
    • http://sabandina.com/uploads/1/3/0/6/130620917/rasozapowebexe_xodokefo_jijapinof_wupupa.pdfIn PDF document text
    • http://www.northernlightbengals.com/uploads/1/3/0/6/130604560/201f86f248b8ab.pdfIn PDF document text
    • http://riveroaksvet.preview.pethealthnetworkpro.com/uploads/1/3/0/7/130739510/lizunapo.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_off000082bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82BD 7644 bytes
SHA-256: 45b6e5ab7d85c89e818443dc3265954f94f8b065d1ab09e57c01da81e2405007

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