Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b360ebf1686b240…

MALICIOUS

PDF

72.5 KB Created: 2021-04-04 02:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a4dd58dc74f4bd1ee3234c1de4af10bb SHA-1: dc04b4e7392c173ac49c03b9589d924c35e2388c SHA-256: 0b360ebf1686b2409fbe45903c90971e4e7baf17a1187b8261b85d68377c9d2c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. ClamAV detected it as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded content, though heavily obfuscated, appears to be a lure related to a 'Sewanee campus map' to encourage clicks on the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=sewanee+campus+map PDF link annotation
    • http://hrushch.space/wivowoganimufowsmn3q.pdfIn PDF document text
    • http://pihodze.com/noreberivanuvom0d0rj.pdfIn PDF document text
    • http://mon-compte-cmb.best/accurate_heart_rate_monitor_app_androidnvmie.pdfIn PDF document text
    • https://silajawa.weebly.com/uploads/1/3/4/3/134339193/sizuxowigog.pdfIn PDF document text
    • http://nomiwiturej.getenjoyment.net/download_maskot_asian_games_2020.pdfIn PDF document text
    • http://memiwuv.mygamesonline.org/umayyad_dynasty_in_urdu.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/how_to_use_iphone_4s_as_webcam.pdfIn PDF document text
    • http://niludop.22web.org/how_to_use_tefal_deep_fat_fryer.pdfIn PDF document text
    • https://pekavodasusoku.weebly.com/uploads/1/3/5/9/135982803/09706.pdfIn PDF document text
    • http://saniwigudovo.scienceontheweb.net/sawabomunepudajoxuromotoj.pdfIn PDF document text
    • http://cloudmarket.website/gma_news_tv_program_sponsor_templatemcfdc.pdfIn PDF document text
    • http://artyom.guru/vizio_sound_bar_remote_not_workingwbtpf.pdfIn PDF document text
    • https://digakope.weebly.com/uploads/1/3/5/9/135974251/biwit-wapuwero-patil.pdfIn PDF document text
    • http://zexofezureza.iblogger.org/78700290239.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_0abdced6727540e6b46982c6876a1500.pdf?index=trueIn PDF document text
    • http://xifusejikudit.rf.gd/56110221044.pdfIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_b4b638dac992497f91d5db08651669ce.pdf?index=trueIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_f9be8f49d5394b67a4cb9fb636b80aed.pdf?index=trueIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_648109b320c24349ad1edf4cf7f5aed8.pdf?index=trueIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_f68fc3aa1fc148c5aa05d8866e14d3e6.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_2f9c1911473d418e8b8fd987cb847829.pdf?index=trueIn PDF document text
    • http://sevetise.rf.gd/balao_da_informatica_em_sao_carlos.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_12b8fe94fc60478ebea54b266bf7a806.pdf?index=trueIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_4763a17bb5624d04b24f958f63ba89b4.pdf?index=trueIn PDF document text
    • http://kewetanetoza.atwebpages.com/93118838232.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_off0000dd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD75 5148 bytes
SHA-256: 83bfab5e4a98f768a72c7957e61cfe17a61531b380f7b162f48789e91fc08d96
font_01_sfnt_off0000eefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 11004 bytes
SHA-256: 234a1fa200c355210789e33203f8dd619a6aa0410e35d8a02da54b16b5d0772b