Malicious PDF — malware analysis report

Static analysis result for SHA-256 7254bb6a0bca60d5…

MALICIOUS

PDF

80.9 KB Created: 2021-02-07 02:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1a862b0346e000ec93a15b2d5586456e SHA-1: f22117a3cb8b3f5cf9586f3a2fc25f19777096a8 SHA-256: 7254bb6a0bca60d596eb6509e90e412e242fd12620e0478c69ee257dfc4cfc8c
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm used to obscure the final malicious destination. The presence of 'utm_term' parameters suggests tracking or redirection, further supporting a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/aws?utm_term=kendo+grid+group+header+template+mvc PDF link annotation
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/wagazaf_kajuvabofovo_ribogo.pdfIn PDF document text
    • http://xobuxok.22web.org/32683780475.pdfIn PDF document text
    • http://front-glass.website/28389827851iiu82.pdfIn PDF document text
    • http://tubipegutadob.iblogger.org/contract_termination_template.pdfIn PDF document text
    • http://burrrhey.tech/lonusivalemudotubalurakeoqgzh.pdfIn PDF document text
    • http://kinokaiff.space/tizidevetakomokorasozegbsoof.pdfIn PDF document text
    • http://ximasoj.22web.org/bus_horn_song.pdfIn PDF document text
    • https://xuvunigito.weebly.com/uploads/1/3/1/1/131164310/6872644.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://zumijuxuv.epizy.com/adjetivos_en_ingles_y_espaol.pdfIn PDF document text
    • http://vogojitipam.epizy.com/hyperthyroidism_guidelines_2018_ppt.pdfIn PDF document text
    • http://malinaliwul.epizy.com/6334421395.pdfIn PDF document text
    • http://xakosafejel.epizy.com/pesumometotejawawi.pdfIn PDF document text
    • http://muzubakow.epizy.com/brother_mfc-_l2701dw_driver.pdfIn PDF document text
    • http://pasexojubil.epizy.com/front_desk_training_manual_template.pdfIn PDF document text
    • http://motinekan.epizy.com/86468659176.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/orasadha_album_video_song_isaimini.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA38 5220 bytes
SHA-256: dc40311e9efca7e49f1ba9e17590a67f26e69be8650b5e031c41db5c6bb41811
font_01_sfnt_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 6520 bytes
SHA-256: 32358e11195b7bc74dc69b1ec77337797b27d2319967fb2d51345f7f977fbe63
font_02_sfnt_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 11976 bytes
SHA-256: 59801df1205fd5d8ad2de1c66861e1842a58941352fd1091ab864f2019b04eec
font_03_sfnt_off0001261e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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