Malicious PDF — malware analysis report

Static analysis result for SHA-256 669b1f008e461e41…

MALICIOUS

PDF

52.9 KB Created: 2020-03-31 19:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: f57ddecd3013f204b23b6e168c84a945 SHA-1: 7a0ff2f94754869d27be4c639c3538919509afb2 SHA-256: 669b1f008e461e416fd80ac7b5c41c9231f75581a4ce2fb839c9baf528656432
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, a technique often used for SEO manipulation or to host malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. No scripts were extracted, but the sheer volume of outbound links suggests a malicious intent to redirect the user to potentially harmful sites.

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://wccscience.com/uploads/1/3/0/4/130477287/130477287.html#geometry+formulas+surface+area+and+volume PDF link annotation
    • http://seedlinghospitality.com/uploads/1/3/1/1/131164479/72b0d4a44.pdfIn PDF document text
    • http://hsenviron.com/uploads/1/3/0/4/130436166/julija-pegusidofuxedun.pdfIn PDF document text
    • http://explosivedance.com/uploads/1/3/0/5/130590558/bf0b7.pdfIn PDF document text
    • http://a3sgestion.ch/uploads/1/3/0/6/130604848/8241637.pdfIn PDF document text
    • http://derrameister.com/uploads/1/3/0/5/130551013/muzajod.pdfIn PDF document text
    • http://vividellebeauty.com/uploads/1/3/0/3/130324370/5853d.pdfIn PDF document text
    • http://drgnzombiestournament.com/uploads/1/3/1/3/131398186/nesubijej.pdfIn PDF document text
    • http://simplycryptocurrencies.com/uploads/1/3/0/6/130604054/7a08e1b54.pdfIn PDF document text
    • http://k9101raw.net/uploads/1/3/0/2/130288386/712114.pdfIn PDF document text
    • http://frommynotebook.com/uploads/1/3/0/2/130288506/jatimefid.pdfIn PDF document text
    • http://angelicmindsllc.com/uploads/1/3/0/9/130969322/ninimo.pdfIn PDF document text
    • http://laurensfashion.com/uploads/1/3/0/5/130539102/0ab0e02eab.pdfIn PDF document text
    • http://cleanhealthherbs.com/uploads/1/3/0/4/130476068/lokaxawu_mujolenavap.pdfIn PDF document text
    • http://redhotyogastudio.com/uploads/1/3/0/4/130483867/1856806.pdfIn PDF document text
    • http://mummabearcare.com/uploads/1/3/0/4/130435898/dofaresuda.pdfIn PDF document text
    • http://kayosportswear.com/uploads/1/3/0/2/130292089/2a0c8f4132de8.pdfIn PDF document text
    • http://bostonjeepz.com/uploads/1/3/0/4/130435966/9485244.pdfIn PDF document text
    • http://comparibuilt.com/uploads/1/3/0/2/130273788/remojobapibagu.pdfIn PDF document text
    • http://aligiabao.com/uploads/1/3/0/6/130621829/8cfe881.pdfIn PDF document text
    • http://winesonmainchelsea.com/uploads/1/3/0/7/130775828/sozomefo-jadiwujonatevas-deruwukogivi.pdfIn PDF document text
    • http://samuelprovencher.net/uploads/1/3/0/6/130604699/8565994.pdfIn PDF document text
    • http://o1.email.koch-amps.com/uploads/1/3/0/7/130740387/22660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: octarinesec.com 13 samples

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_off00008605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8605 8136 bytes
SHA-256: 4f92c4d2c6d568d2a5254dd06abc5e8ac6b53b34870ee09161832ea9054250bf
font_01_sfnt_off0000a5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B7 2988 bytes
SHA-256: 6e2afe4324691a3c3a71b7653f03a4a599aa7dc33e86dd02acce13a6881b843a
font_02_sfnt_off0000b045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB045 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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