Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdacd9234d4608fd…

MALICIOUS

PDF

74.9 KB Created: 2021-03-20 07:18:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e02b1edfd2d89a3b7cab47edb938e15a SHA-1: 71a3b05aa012de4bbfe362faa07be0f1de11acef SHA-256: bdacd9234d4608fd5f2db287458d7236ab523024da59fc71da6369fdda457f5e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a lure related to 'high school gymnastics coaching jobs'. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The presence of many external links, including a 'link farm' heuristic, indicates an attempt to manipulate search engine results or direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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 https://jottigo.ru/wix?keyword=high+school+gymnastics+coaching+jobs PDF link annotation
    • http://koxivesuvif.mypressonline.com/how_to_set_up_hotspot_on_verizon_iphone_xr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_5fd0e9d380670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_6051117ddcb10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455178/normal_6000a2335a3e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502819/normal_5fdd3906cf4cd.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/a799b28c-1eab-46c8-b00e-ad04727a3b6d/letra_cancion_catolica_saber_que_vendras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c85db21-8196-4c79-8672-49a006f976fa/sonic_adventure_2_gamecube_controls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4fb65c3-46c8-40a5-92a5-f30a693fd70e/xulowajerutibajedakaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd0466a-e55e-4f41-9cf1-3fcca101ba61/hidden_secrets_of_the_bible_history_channel.pdfIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_02137419bdf14c7c95656c16f07a6fb8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb91a7a-ad21-47bc-9732-39d4979eb1b6/sifezokajuve.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_4fd946a7b8a54035bab9903a4db48673.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2da30d9-a197-4f75-bdab-d5ef047a79ae/latest_amendment_in_section_138_negotiable_instruments_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ce5a66-52bf-482a-949b-710308d3a3d6/2599577554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e02ba6-f1a7-4458-acea-4e6a00d8a141/11688685277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e533528-75a0-459d-aa8a-9427ace72bdb/83352783848.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/gugil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826855b8-fd90-4751-adcc-a41c571f9dc1/how_to_reload_a_diaper_genie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b73af032-20b4-46b1-a37f-587073a2e41d/great_value_bow_tie_pasta_nutrition_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edac0d88-ecc5-499a-9c51-3e3fd470afe5/shareit_pc_app_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33c25d1d-bc02-4115-baa5-73c178af11b3/nasm_essentials_of_personal_fitness_training_audiobook.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_off0000e7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 5396 bytes
SHA-256: f4af1a33fd839baf19e9f4d6786ab020f8557d5a9f24a5c18b4631e26d58f8c9
font_01_sfnt_off0000fa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 10668 bytes
SHA-256: 0a5b7da72947e3ad6009d61e8eb6194f40e3e7893797c3ceb156d8288b3e731e