Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4ad3565310ac05…

MALICIOUS

PDF

84.8 KB Created: 2020-04-01 14:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 73bc1b4a730617f2434009278b4ad857 SHA-1: fa0530b9971c0ce902474ab67918fdd27efe2488 SHA-256: 1e4ad3565310ac05a77027e9c5e8e87715193c0f3f44fb6f0ab36a5bc541655d
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the document body text, though partially garbled, also contain references to these external resources. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://savimae.com/uploads/1/3/0/7/130738658/130738658.html#online+hebrew+english+interlinear+bible PDF link annotation
    • http://hostmaster.guentertouschek.com/uploads/1/3/0/6/130639116/5462f6a028a68.pdfIn PDF document text
    • http://ambroseuatomotive.com/uploads/1/3/0/8/130874648/6077490.pdfIn PDF document text
    • http://studentsandstartups.com/uploads/1/3/0/5/130539599/sotabejiror.pdfIn PDF document text
    • http://apushmannino.com/uploads/1/3/0/4/130476458/2888460.pdfIn PDF document text
    • http://openbankingforum.com/uploads/1/3/0/6/130603895/3825576.pdfIn PDF document text
    • http://gaumukhtapovantrek.com/uploads/1/3/0/6/130605505/fopebaxegi.pdfIn PDF document text
    • http://midamericacongregationallife.org/uploads/1/3/0/2/130272084/gigupof.pdfIn PDF document text
    • http://south-county-urological.net/uploads/1/3/0/3/130312919/7a93a6496b92.pdfIn PDF document text
    • http://luigibrozzi.com/uploads/1/3/0/3/130323182/wibavasaf.pdfIn PDF document text
    • http://creatinghappiness.net/uploads/1/3/1/1/131164402/39953a3.pdfIn PDF document text
    • http://ferienwohnung-robinson.ch/uploads/1/3/1/3/131384679/tasumejinowiko_nepaw_gujisemulave_wekejulolugorul.pdfIn PDF document text
    • http://reviveyourspirit.net/uploads/1/3/0/3/130379415/646fcefaa174.pdfIn PDF document text
    • http://gratefullyyourscocolove.com/uploads/1/3/0/2/130273616/ketala_gikutudu_boripebativezaf.pdfIn PDF document text
    • http://luther2017.org/uploads/1/3/0/4/130490808/bimopofepaboseneja.pdfIn PDF document text
    • http://rttdrafting.com/uploads/1/3/0/6/130620353/puzejejuniximik_gefuge.pdfIn PDF document text
    • http://ttll-kids.dk/uploads/1/3/0/4/130476703/b89759e1ffc080.pdfIn PDF document text
    • http://mojibliss.com/uploads/1/3/0/8/130813966/6773307.pdfIn PDF document text
    • http://gestionotis.com/uploads/1/3/1/4/131407351/bbbda5c02a81.pdfIn PDF document text
    • http://keepitfresh.net/uploads/1/3/0/4/130436285/zesedazijukem-bepoguviki-siwumux.pdfIn PDF document text
    • http://rollcallamerica.com/uploads/1/3/0/5/130543106/8424997.pdfIn PDF document text
    • http://broylesvisionofgiving.com/uploads/1/3/0/6/130604263/relakarux.pdfIn PDF document text
    • http://slimetimepartiesaz.net/uploads/1/3/0/6/130621854/49b36.pdfIn PDF document text
    • http://openmasajes.net/uploads/1/3/0/3/130323674/sitaxip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.stixfonts.orgIn PDF document text
    • http://www.micropress-inc.comIn PDF document text
    • http://www.stixfonts.org/user_license.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
    • 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
    • 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
    • http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFD 10140 bytes
SHA-256: 9a712d42298ae029aaf71e36db83c76c94d3997383ec13642a19b0c0d1f23863
font_01_sfnt_off0000f036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 4216 bytes
SHA-256: 8c94e0fbbf081027b2bdb914e649f3cb649e7a4fb701aaf5ff71d1d2f2573989
font_02_sfnt_off0000fd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9F 3168 bytes
SHA-256: 5dd4d2c7b0ada79bcbf438633c130eed9a8bd01ff4fec174fdd4a3176ff4141e
font_03_sfnt_off000108de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DE 21376 bytes
SHA-256: 01c77edc1dea69d3aa943633f018472c28db8beb664d4bc73ba566b66468fff9
font_04_sfnt_off00012f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F38 10756 bytes
SHA-256: c55bd50c33372faf3911d81da66599366e948b1fe2ba8c0f1ca52618f362e8a3