Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf12971a003974e8…

MALICIOUS

PDF

70.6 KB Created: 2020-10-04 18:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 60a3313a1c732ca1a0b2ce7e9d925944 SHA-1: 6acea9c105f294eaca2caeaeccb01a1007b896f0 SHA-256: bf12971a003974e8f75e62fc821ea99dbc5756290e802dd93d88c08f8dc58251
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://cctraff.ru/strik?keyword=cursos+de+latin+pdf In PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/65588669930.pdfIn PDF document text
    • https://site-1039148.mozfiles.com/files/1039148/nimupobugumi.pdfIn PDF document text
    • https://site-1037848.mozfiles.com/files/1037848/51254222291.pdfIn PDF document text
    • https://site-1040080.mozfiles.com/files/1040080/rozosavovebog.pdfIn PDF document text
    • http://xowuwu.jingyouecon.com/uploads/1/3/0/7/130740206/tujokuratedexu.pdfIn PDF document text
    • http://files.accidentallymj.com/uploads/1/3/1/4/131409574/6d295104b9.pdfIn PDF document text
    • http://taduxi.gumbogiftsandgallery.com/uploads/1/3/1/3/131398102/6095452.pdfIn PDF document text
    • http://files.extraordinarykydz.com/uploads/1/3/1/4/131454492/jomitubenifewob.pdfIn PDF document text
    • http://vuzuzas.brisbanehomoeopath.com/uploads/1/3/1/8/131872048/finib-fogatob.pdfIn PDF document text
    • http://files.sweetrollercoaster.com/uploads/1/3/1/8/131856365/rekozotime.pdfIn PDF document text
    • http://files.losangelesvikingcharities.org/uploads/1/3/1/1/131163953/7bd2413e51140.pdfIn PDF document text
    • http://diwiduw.upstandingpainandspine.com/uploads/1/3/0/7/130739626/87afb934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e756d846-868f-4963-b241-0a3cfb27a2ec/vifofezadatuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/793e38c9-6763-4de9-832f-3382dce828f4/boroselop.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000096eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EB 4940 bytes
SHA-256: 39e988504427971f0638945633b5fabd197156d64448577024f6e70e2cbdc1c7
font_01_sfnt_off0000a7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BB 14328 bytes
SHA-256: c1022adf837eb09118415e6aa9ea9a9655a09dbd1346676e27a65e24e65d762f
font_02_sfnt_off0000cce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE9 12220 bytes
SHA-256: 8424726e4a6b355d1a82c27a710288d05aa1c66ff78c928f76fdd40acbcd01cf
font_03_sfnt_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 16480 bytes
SHA-256: 2dba3f86cb609713f97b774ed0d9d7d936c6f1c14a61ee874e0dc29bc7d3bbd9