Malicious PDF — malware analysis report

Static analysis result for SHA-256 953979de6cba20e7…

MALICIOUS

PDF

80.2 KB Created: 2021-04-04 11:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fafb55204ad456c346ee4b4a4fd1edc5 SHA-1: b178a016d51ca16bcd6008d8f58c77c7233a4ab1 SHA-256: 953979de6cba20e7e55678cdac01fb444f725dd0ba02a05c38d3724aae71687b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically appearing as a search result for 'Oreck xl vacuum repair'. This URL, https://ponafet.ru/strik?utm_term=oreck+xl+vacuum+repair, is hosted on a domain flagged as potentially malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is part of a link farm on disposable hosting, further suggesting a phishing or malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://ponafet.ru/strik?utm_term=oreck+xl+vacuum+repair PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458122/normal_5fc9bb7117081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420031/normal_5fefb77483ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421641/normal_6053178a019b7.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/77875245774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445544/normal_5ff06bdd87ad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_603c1b86af3f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_605709e9ae2c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_602f992f79c43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384050/normal_6003882eb7111.pdfIn PDF document text
    • http://sukaxebodaruju.iblogger.org/how_much_does_an_average_sweet_potato_weigh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_6044cdf2a37e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461483/normal_603fea86aeb3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://roxujewov.myartsonline.com/marantz_sr6009_prix.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/colors_tv_serial_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/12283749172.pdfIn PDF document text
    • http://tanikotik.epizy.com/36232275060.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_5818439443ff4448b020bce2f1649411.pdf?index=trueIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_dd4614d30786498bbdee027fdd8a8d85.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokudapele/when_i_was_young_in_the_mountains_cynthia_rylant.pdfIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_ecd3e176d00a4760910a719f703bcc55.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vipinib/best_android_graphics_games_2019.pdfIn PDF document text
    • http://vodufimanu.epizy.com/anchoring_script_for_farewell_party_in_english.pdfIn PDF document text
    • http://pimimozoji.myartsonline.com/44938814735.pdfIn PDF document text
    • http://movuzog.rf.gd/atelier_bow_wow_graphic_anatomy_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/wolf_of_wall_street_meme_reddit.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/bleeding_love_piano_sheet_music.pdfIn PDF document text
    • https://6dca1d0c-b102-4aa4-a312-d013f97c39dd.filesusr.com/ugd/fb87fb_c54a4af457db4353b338b3cac4d128a2.pdf?index=trueIn PDF document text
    • http://sanugifop.atwebpages.com/22544819885.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 4704 bytes
SHA-256: c1580cbbb419d28a6dd281fc3816bfbe8425851842555d9c479021c52a474b80
font_01_sfnt_off0000ff4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4B 11116 bytes
SHA-256: 8918baabcb5c97ff75261831060163116131a3657ccf0141576acb4efe47cf88
font_02_sfnt_off0001250c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2