Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb43c82ae6b69962…

MALICIOUS

PDF

47.3 KB Created: 2020-03-07 20:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: ac16265f5802bc7e7edd1a217532bbd1 SHA-1: 722b8baaecfaf72a262c35197bdc52da2ca2e650 SHA-256: cb43c82ae6b699628ab9d7105f52aff43f89cd0445e972157462527728fa19df
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to a vast network of websites, likely for SEO manipulation or to host further malicious content. 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://webdisk.jhigh18.com/uploads/1/3/0/5/130590235/130590235.html#apache+nifi+logo+png PDF link annotation
    • http://www.divafitsportswear.com/uploads/1/3/0/6/130621800/cff44.pdfIn PDF document text
    • http://luxurydaytonahomes.com/uploads/1/3/0/3/130324075/ae1ec4062.pdfIn PDF document text
    • http://www.chitchatchan.com/uploads/1/3/0/7/130738730/84985aa819ec6e.pdfIn PDF document text
    • http://jcountyacademy.org/uploads/1/3/0/5/130551330/zejejujafefoxusuzu.pdfIn PDF document text
    • http://towtruckinsuranceus.com/uploads/1/3/0/6/130604322/kubuwasaxejise_pufuwuvaki.pdfIn PDF document text
    • http://winsettrentals.com/uploads/1/3/0/8/130874150/gatagofe.pdfIn PDF document text
    • http://milwaukee-music.com/uploads/1/3/0/4/130435881/fujozoxiw.pdfIn PDF document text
    • http://shopjollygoods.com/uploads/1/3/0/7/130776724/wizexiko_zarudujukizos_tosaxemaza_zuwexawe.pdfIn PDF document text
    • http://jbentrepreneur.shop/uploads/1/3/0/5/130550760/sulekupewuzex.pdfIn PDF document text
    • http://sarawiseman.org/uploads/1/3/0/5/130588989/domaxe.pdfIn PDF document text
    • http://merchandise.kevincruise.co.uk/uploads/1/3/0/6/130604456/wipivujalujet.pdfIn PDF document text
    • http://bjarkalundur.is/uploads/1/3/0/7/130740158/1415012.pdfIn PDF document text
    • http://avikat.com/uploads/1/3/0/6/130620563/5180845.pdfIn PDF document text
    • http://1010tradefx.com/uploads/1/3/0/9/130969845/9623606.pdfIn PDF document text
    • http://goodmorninghomes.ca/uploads/1/3/0/6/130604091/kifedikovuwejo_xiwoperozufire_besibojepota.pdfIn PDF document text
    • http://freestylegroupdevelopment.com/uploads/1/3/0/4/130477719/4360965.pdfIn PDF document text
    • http://www.littlemister.net/uploads/1/3/0/5/130542991/mojarufil_mokolab.pdfIn PDF document text
    • http://jessicaleiserproperties.com/uploads/1/3/0/6/130605240/temojo-gawige-zuwipiwane.pdfIn PDF document text
    • http://www.3moreband.com/uploads/1/3/0/6/130621826/naziwaxowag_fodipelarud_vaxibokum.pdfIn PDF document text
    • http://islandviewlawncare.com/uploads/1/3/0/6/130620975/luriz_baneli_donodego_soben.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B74 8304 bytes
SHA-256: 7cd4ea6cd78e0885beb2738317b119faaea39e27d52427b133aa8f68f4d8ff29
font_01_sfnt_off00008b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B41 4700 bytes
SHA-256: e68f22bd94b269b7d6f7f786a077b7c76251833bcd0cdb5a1ff7c94ebf79c1fe
font_02_sfnt_off00009a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A59 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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