Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ec7f6ede0cb218…

MALICIOUS

PDF

81.6 KB Created: 2021-05-11 21:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 22904e865ac0c08f109684288a2e453d SHA-1: 29ff705e2991b0064da2713645613297c496ff7b SHA-256: 47ec7f6ede0cb2185a5bbabb199dbc392c5358673fda8b60c64c645e0ab7cd41
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and contains numerous embedded URLs. One prominent URL, 'https://botokaw.ru/strik?utm_term=rinnai+b26+installation+manual', suggests a lure related to installation manuals. The PDF's structure and the presence of multiple external links indicate an attempt to direct users to potentially malicious content, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=rinnai+b26+installation+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379848/normal_606764fae0bbf.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/politi.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/ultimate_guide_for_arduino_sensors_and_modules.pdfIn PDF document text
    • http://nuwojukow.mygamesonline.org/cahier_des_charges_informatique_exemple.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/kaseka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_6014b50062074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402717/normal_604d04f9c5c57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485163/normal_60009f2d2373f.pdfIn PDF document text
    • http://siluvuxifebul.medianewsonline.com/cours_probabilit_loi_binomiale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_71e7f941f8e94d77810ae8606f49aeaf.pdf?index=trueIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_59d5bbf64be94646bfc5f7783c3ef0a9.pdf?index=trueIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_7addc47b32e24a83a05fe9277930821b.pdf?index=trueIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_d893d7c27684489c80ace86e7f43b27c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71eafdf3-f86c-4b88-b7da-c07f08c1c30a/how_do_i_renew_my_food_stamps_online_in_texas.pdfIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_8faa1079ff1e409fb788e78d4743d80c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7824e91b-5e8b-47f5-9400-475768c4b688/teacher_created_resources_power_pen.pdfIn PDF document text
    • https://6205d428-d5dc-494e-bbc3-e2236f9d811e.filesusr.com/ugd/6885a6_66a6f44e47cd4d37a6aa9300442ea733.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0702a906-845a-4aff-ad89-65233cb33d8f/download_unity_2d_assets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1937f961-bf6c-4b9c-86c9-f4b4402eef07/raravapewanoxubujed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24ce1c1-e112-4aa7-9049-8e3bb04b3071/how_to_construction_cost_estimate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd093131-3607-4665-90dd-3066f7278872/21412735147.pdfIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_ad8398b6693c42ef8ca4479c127647ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73ab19c-53f4-4242-9de6-ffcff62935ec/engineering_mechanics_dynamics_8th_edition_solution_manual_meriam_kraige.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_off0000ffe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 5168 bytes
SHA-256: 09371073a2649962815a849cd77e039aa76515e1ff38b5dc2818009842a71d8b
font_01_sfnt_off00011169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11169 11152 bytes
SHA-256: 537dda27d5b2b22c7e5de24cec578e95d81002fcab475fbe1b076be819f3aea2