Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3224305fb5eac3c…

MALICIOUS

PDF

73.5 KB Created: 2021-03-02 18:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6c96eb4b8acfbdb4d65ded8ec9b8c847 SHA-1: ecadf5d9a1ce2a1e389660725bff18492470fba9 SHA-256: f3224305fb5eac3c483b9927077cbefdca751c81c7d06912cfeca041abbb7b50
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a phishing or link-farming operation. The document body, though partially corrupted, appears to be a lure related to "how to change resmed airsense 10 filters", likely designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://baarspo.ru/award?keyword=how+to+change+resmed+airsense+10+filters PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382192/normal_5ff6059bf363b.pdfIn PDF document text
    • http://jedugefipevama.iblogger.org/6407805831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480582/normal_603c35afc4d80.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/data_science_course_colleges_in_pune.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/sosipu.pdfIn PDF document text
    • http://scandisvet.ru/beats_studio_pro_wireless_earbudsk1en3.pdfIn PDF document text
    • http://proba7.xyz/balcony_scene_romeo_and_juliet_sheet_music2iphc.pdfIn PDF document text
    • http://fruitik.space/74560644572y0637.pdfIn PDF document text
    • http://nevoxodaw.66ghz.com/aion_2._5_client.pdfIn PDF document text
    • http://xadojewivo.iblogger.org/5583001192.pdfIn PDF document text
    • http://bopodimo.iblogger.org/69777383447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_5fe9707068fb5.pdfIn PDF document text
    • http://fionainthefield.org/mobagigzzhjp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_603cb9ff150be.pdfIn PDF document text
    • http://interbankdigital.com/66888495637i9e5u.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/dosipive/hurry_crossword_puzzle_answer.pdfIn PDF document text
    • http://regipikiwubadov.epizy.com/moputuxabazaximubov.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/88946115039.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_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 5680 bytes
SHA-256: a0ab2e72b0e0dd9109a85d54cf1db6460289b91788251bfbfbad6de25cecf5a6
font_01_sfnt_off0000f418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF418 10872 bytes
SHA-256: 0d2e0a5f2709c5c6ded36b47ecd9fad6817926c05b7e246f3f2a772f76ee851c

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