Malicious PDF — malware analysis report

Static analysis result for SHA-256 43b96221ff75cd0a…

MALICIOUS

PDF

77.6 KB Created: 2021-04-01 06:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 74925a7be7c06607b0e62564b3c53b41 SHA-1: 4c9692103e4de883356af7f7c83ba728c3c87815 SHA-256: 43b96221ff75cd0a4bd92c5f06cac7857bf2e59e37089fcc5d8a06edf64b0813
192 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded links and a call-to-action button, designed to redirect users to potentially harmful websites like dafemum.ru. The document body, though heavily obfuscated, appears to be a lure related to 'Garageband import mp3 ipad'. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/strik?utm_term=garageband+import+mp3+ipad In PDF document text
    • http://mebovaduzi.mywebcommunity.org/how_to_use_sports_hd_dv_sq11_mini_dv_camera.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/599d5866517aa7.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/free_high_school_physics_textbook.pdfIn PDF document text
    • http://raxawevamavox.getenjoyment.net/53185038836.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/dec_2020_calendar_printable.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/bank_po_syllabus_2020.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/the_secret_book_and_scone_society_book_2.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/autonomic_nervous_system_pharmacology_mcqs.pdfIn PDF document text
    • http://datovufes.scienceontheweb.net/36375247738.pdfIn PDF document text
    • https://talotemeve.weebly.com/uploads/1/3/1/6/131606578/xazopor.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/mefovu/69232138804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61320ac4-770d-4d3e-83ba-8ab944b92e90/50734500377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba513ec-2e0b-4251-8f53-2dc718536e0e/84935453299.pdfIn PDF document text
    • https://0a38098d-26c8-4844-ab0b-2dfc398d7f8d.filesusr.com/ugd/fffd55_9df8e859694c4f7b8861a619bd413caf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/veeche_chirugaali_nadugu_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57635290-65d9-40e7-84bc-18eff48d97e7/73422764888.pdfIn PDF document text
    • http://juvusowupu.onlinewebshop.net/genetic_algorithm_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/81248191394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1389b413-e452-44ff-ae4c-3b9405c81060/54127384639.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/kokumaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886d075e-cf27-4d67-88b0-6a0578827984/does_dish_have_hd_channels.pdfIn PDF document text
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_cd3c8ef018f84ae996211200f57397ce.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_10ae93c00866488bbc27a2f19d1c79f1.pdf?index=trueIn 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_off0000f0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B7 5404 bytes
SHA-256: 395b9e56ba41ea1b4c394e4e3d2c2ff97c230d3b62183ea1aaad85e43d716e5a
font_01_sfnt_off00010302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 10580 bytes
SHA-256: 4c091c0bc50b8abfbd6d50606f09451f76b198ac4fdf2d24152a334d1229d7f5

Open this report in the interactive analyzer, or submit your own file for analysis.