Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda37139d646dd64…

MALICIOUS

PDF

78.2 KB Created: 2021-04-17 22:33:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 85fbe0f7974526dcc1e849c30d31778e SHA-1: 64d0c2850e6db2c10851ec0901ca013e1723f2b6 SHA-256: bda37139d646dd64fe23786ae47583b028e4269ad05b21b54fbfa51945e94d01
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary lure related to a "P90x workout meal plan download". The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/strik?utm_term=p90x+workout+meal+plan+download PDF link annotation
    • http://botanilix.mygamesonline.org/tutorial_vba_excel_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481993/normal_5ff4b9ec935a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_60489b825aa8e.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/nenumebirovudotavezuxil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5ff894622307c.pdfIn PDF document text
    • http://tunewejewuz.mypressonline.com/stop_saying_youre_fine_mel_robbins.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fe11488d7b0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415055/normal_5ffe51ad417a7.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/jipowumat/maths_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61efa2f-8352-4348-9c6a-8335761afe44/oster_xl_toaster_oven_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bab1165-4ddf-4fe6-9565-aa3f5914ed44/veras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1cf50c-0adf-40e9-b99f-86dba6af98da/tifagiwabononetajija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a44f175e-de88-4f6c-9cca-1f23bd2e2bfa/jenewojepevenusuxugasada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f263b4-03d3-4a88-8de9-302466340d08/45890816438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3f22a8-5511-4548-bbf4-8e8e00a4ab5c/jaridazotagenobujitavore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482e8051-23c4-47a6-803e-91884cf82bd0/zoferovefakorojuvojamov.pdfIn PDF document text
    • http://xezaretidatoro.onlinewebshop.net/77073874754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f79587-311a-4644-8107-df7b10d25d7c/25085020134.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/asterisk_cdr_reporting_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/best_2x2_algorithms.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/bairagi_comedy_3gp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56024ae9-41df-4a5b-acab-904d42d3310c/39047806380.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/borg_warner_velvet_drive_71c_rebuild.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e3b000-6880-49be-9649-68154b121c6f/gps_garmin_montana_650t.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d7bb36-9143-426e-910c-cb721b6f4141/kulepomi.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_off0000f092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF092 5448 bytes
SHA-256: 433545ba78d0afc13014db8d4f5733ed0ef32e4eec0da06fac40f4b0ecff63f3
font_01_sfnt_off0001031d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 11360 bytes
SHA-256: d5d9f09621c9a26dce2dbeeb1a119bc481ad52327850e0ec67b1a1ceb9b918fe