Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43d573f128ea886…

MALICIOUS

PDF

50.6 KB Created: 2020-04-02 16:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5eb8f348bc1abf5036ae7191b351cd94 SHA-1: a6bb59ced3240379429bbf6aac08f12f23d113d0 SHA-256: c43d573f128ea88690473f517c4657c218663bb9ada5a5e491d055eca9a46a35
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique commonly used for SEO spam or to redirect users to malicious sites. The document body contains the string 'Proven incest sex', which appears to be a lure. No scripts were extracted from this sample. The primary attack pattern involves directing users to a link farm.

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://oralkami.com/uploads/1/3/0/3/130323962/130323962.html#proven+incest+sex PDF link annotation
    • http://makeyoursoulbreathe.com/uploads/1/3/0/4/130477702/4067922.pdfIn PDF document text
    • http://preacherswiferetreat.com/uploads/1/3/0/7/130739450/kimunivisupi.pdfIn PDF document text
    • http://bkmm.nl/uploads/1/3/1/0/131071312/8324589.pdfIn PDF document text
    • http://tattoovictoriatexas.com/uploads/1/3/0/7/130739664/viwibe.pdfIn PDF document text
    • http://aksmith-lcpsdistrict2.com/uploads/1/3/0/3/130313324/kaxodar-tugilimotixar-zinuvopaxozuvo-mewutifug.pdfIn PDF document text
    • http://lenke-nauck.com/uploads/1/3/0/7/130739983/1500007.pdfIn PDF document text
    • http://traillsendmountainbikecamp.com/uploads/1/3/0/7/130739982/5af1d59a40e.pdfIn PDF document text
    • http://mta-sts.mx.thepinkevent.net/uploads/1/3/0/8/130813692/muriwos.pdfIn PDF document text
    • http://miguel-castro.com/uploads/1/3/0/7/130739504/a6d44d330dbf.pdfIn PDF document text
    • http://duluthvisit.com/uploads/1/3/0/4/130435685/4157185d00b.pdfIn PDF document text
    • http://rosecityinspections.com/uploads/1/3/0/5/130539345/331478.pdfIn PDF document text
    • http://stockphotoheaven.com/uploads/1/3/1/3/131383652/7300685.pdfIn PDF document text
    • http://fireplacemusicgroup.com/uploads/1/3/0/6/130604699/4384943.pdfIn PDF document text
    • http://garethroriston.com/uploads/1/3/0/5/130589283/7527756.pdfIn PDF document text
    • http://twoandtwocompany.com/uploads/1/3/0/2/130274166/moxupatan.pdfIn PDF document text
    • http://prestonlakeranch.com/uploads/1/3/0/2/130272336/jizovemelefari.pdfIn PDF document text
    • http://lonestarcrystals.com/uploads/1/3/0/5/130541023/4642407.pdfIn PDF document text
    • http://kathleenbundy.com/uploads/1/3/0/7/130738503/nixopeba.pdfIn PDF document text
    • http://benmadiganwi.com/uploads/1/3/0/4/130476462/nixuli_wedazixawugoluw_vesolemek_beseduk.pdfIn PDF document text
    • http://altitudenursingservices.com/uploads/1/3/1/3/131384559/safotopituporev.pdfIn PDF document text
    • http://rtbseo.com/uploads/1/3/1/0/131069812/9649716.pdfIn PDF document text
    • http://elpasopetgroom.com/uploads/1/3/0/5/130588427/f1d4aec51.pdfIn PDF document text
    • http://gizatzen.com/uploads/1/3/0/8/130814475/1044413.pdfIn PDF document text
    • http://mail.ladyhoofers.org/uploads/1/3/1/0/131070688/sikupokex.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_off00008977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8977 7800 bytes
SHA-256: 92d33326e37de851c4c285f209512d88e2b9ff5ddecbdc9bb393115a0d8cfdc0
font_01_sfnt_off0000a7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D3 16028 bytes
SHA-256: ca889182d22413b1a5b6446cd5d954c095bfc2c8b2fec1022b19199100617195

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