Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb4085acfad4c10…

MALICIOUS

PDF

70.3 KB Created: 2021-03-25 03:31:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 22d38a8a7d3e6790ca7c1075a3921a16 SHA-1: c2b60601731ce922dc96f0a0ef8604c48a0c191b SHA-256: acb4085acfad4c10c83109b49202d74ffaf39e4f29a4818f6a06627ef3d94a66
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://gimoguvi.ru/123?utm_term=ajax+post+data+json+format PDF link annotation
    • http://fonudesuwobulud.mygamesonline.org/sigese.pdfIn PDF document text
    • https://cdn.sqhk.co/denobafopum/j4giicR/golefoseves.pdfIn PDF document text
    • https://fujepibipaxider.weebly.com/uploads/1/3/1/0/131070521/4717194.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/FggiaDX/name_generator_male_with_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/renosopezare/tdhe3jf/mymcps_classroom_for_parents.pdfIn PDF document text
    • http://legibovusapezo.mypressonline.com/tafapekimibir.pdfIn PDF document text
    • https://xaboweme.weebly.com/uploads/1/3/4/6/134659191/pomumidabomido.pdfIn PDF document text
    • https://dixatuwep.weebly.com/uploads/1/3/5/3/135398053/b20a9a7f36b.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/FihRgcH/healthy_cod_fillet_recipes_uk.pdfIn PDF document text
    • https://vigajinid.weebly.com/uploads/1/3/4/8/134889024/f8e3b.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/e2icAhd/rental_application_form_ontario.pdfIn PDF document text
    • http://rurokewe.iblogger.org/culminating_activity_curriculum_guide.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/fogikevolopen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/luxpro_thermostat_unlock.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/full_form_of_poka_yoke.pdfIn PDF document text
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_9bc4d5cea7544022989460b6313a2a0c.pdf?index=trueIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_51dba6b6205341bb91e1a37ffdf6b3fa.pdf?index=trueIn PDF document text
    • http://pekafujojef.onlinewebshop.net/vocabulaire_animaux_franais.pdfIn PDF document text
    • http://sofidusujewa.epizy.com/67772372266.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/cyberlink_powerdirector_15_patch_free_download.pdfIn PDF document text
    • http://zodumokosijupe.epizy.com/bubiponisu.pdfIn PDF document text
    • http://duxuramubot.epizy.com/background_image_bike.pdfIn PDF document text
    • http://kiwasebax.epizy.com/46516324637.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/diablosport_intune_i1000_vehicle_list.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 5288 bytes
SHA-256: e37343d8d02124a738fe3eb6e971c3ec3dd48245cc8c0950c1591aab0116233a
font_01_sfnt_off0000e64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64E 11184 bytes
SHA-256: d60d97d89c415708a296b24ed53906d68fc7605412353ab10f2e11538c74a5b2

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