Malicious PDF — malware analysis report

Static analysis result for SHA-256 493936e488497db6…

MALICIOUS

PDF

78.7 KB Created: 2021-03-21 09:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ad2d1bde8edf1c168ba208ea10b371b9 SHA-1: c0d810f40052f890411ec72a4f8420f3bee89c2f SHA-256: 493936e488497db683dd5682f4748a9ef470592779ad23e1ead77b38c176e2c6
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting, and one prominent URL that appears to be part of a phishing lure related to 'Miami county auditor'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the PDF structure itself is used to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/wix?keyword=miami+county+auditor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423732/normal_60466825af25f.pdfIn PDF document text
    • http://jilududegurim.22web.org/famedinoninamama.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366010/normal_6003b2d289811.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413345/normal_5fd61d63ca92e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501201/normal_5fc671ba97bc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469841/normal_5fd939f394919.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/masters_preliminary_exam_routine_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_6022d94d30c84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478947/normal_5fe39d7cf0353.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5fcb2fe20fa4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xupimaral/tapikadebegiw.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/kawituzujixilixevinure.pdfIn PDF document text
    • http://sukilik.epizy.com/dorian_gray_2009_full_movie_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d73912-0da9-4e87-906f-fe6508b8f929/who_goes_there_rules.pdfIn PDF document text
    • http://jeputujakajaj.epizy.com/94783190340.pdfIn PDF document text
    • http://radoletoma.epizy.com/pdf_aashto_roadside_design_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4afac648-9128-4a2c-ab13-166be1271d45/its_not_summer_without_you_page_count.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0e67d5-35a3-471f-acb4-2a5a49f1fafd/sezugewonusijotose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a206fe4-6377-470f-8b14-bd23eb64aa9f/girubetanawub.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/bharat_gas_booking_sms_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a1e5f4-b8fb-4634-9a90-fd7a708b3ca0/is_a_500_watt_blender_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc7f05e-ff79-43a0-802c-6951b83ad073/69009633175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cac778c-860b-49b9-a8fa-67107513a7d5/what_does_sleep_apnea_test_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db47c7bf-6bb1-4487-80db-f6f84677d235/gordon_ramsay_ultimate_cooking_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a5ad84f-3052-43be-8aa8-9ca8b113eedb/emotion_wheelchair_wheels_price.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_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 4984 bytes
SHA-256: e9eafbe48a0c92116fd843bde223eb460299311b8e88db9a5e81ae296ce3ddff
font_01_sfnt_off00010636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10636 11004 bytes
SHA-256: 98f2ae0e3b7dce56a6fbf9fbbcdafca03f5f0c3176826f126f044a344ba44c53