Malicious PDF — malware analysis report

Static analysis result for SHA-256 6917129586f04f86…

MALICIOUS

PDF

79.7 KB Created: 2021-03-09 14:55:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01282c5f15658bb367ca7127e0f4e528 SHA-1: 8331ce0efeacdb0371ad2b40b2a5c82ce2997b8f SHA-256: 6917129586f04f86ea3a05f0215fdf4e78051b9449c1f4c28772826c0a3c89de
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicates maliciousness. While no scripts were explicitly extracted, the presence of numerous external URIs and the overall structure point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/wb?keyword=romance%20of%20the%20three%20kingdoms%2013%20review%20indonesia PDF link annotation
    • https://cdn.sqhk.co/molodomo/jEbiagj/23584004313.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/fematepur.pdfIn PDF document text
    • http://wowivawod.iblogger.org/charles_by_shirley_jackson.pdfIn PDF document text
    • https://cdn.sqhk.co/gegatuzikat/JnyFGjd/subway_vinaigrette_sauce.pdfIn PDF document text
    • https://kurupatasewa.weebly.com/uploads/1/3/5/9/135958836/fezuxeli.pdfIn PDF document text
    • http://vuwazakuzasoz.iblogger.org/autocad_2007_64_bit_software_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zezovajav/rjb8X5u/xeganed.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://pugalokero.rf.gd/vamomufefibeledegizixuzed.pdfIn PDF document text
    • http://datufubizut.rf.gd/11563783744.pdfIn PDF document text
    • http://kutelitowolobe.rf.gd/is_silence_of_the_lambs_disturbing.pdfIn PDF document text
    • http://sisigetevi.rf.gd/why_gas_dryer_not_getting_hot.pdfIn PDF document text
    • http://bobiwerebidil.rf.gd/guess_the_tv_show_pic_pop_quiz_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40cbb039-1b96-4f6e-a9f0-65fc63edcc1f/33003954173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b297dd1d-3882-47c7-93df-e890e872e48c/toyota_camry_2019_for_sale_malaysia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a3a90c1-1b66-424b-b2b5-6e7e62baabc5/hp_stream_11_ak0502sa_11.6_intel_celerontm_laptop_review.pdfIn PDF document text
    • http://vasetirepevomeg.rf.gd/bloc_de_notas_huawei_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c8c875-1966-4f1a-a04f-d449fb625050/building_the_gymnastic_body.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_off0000ebc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 5632 bytes
SHA-256: 46825f3ec1cb02acba34cb2fe798819749818a19842f2d6763bdec3052e225aa
font_01_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 10640 bytes
SHA-256: 6d13f020e2444c9bd0c76c10afa4db9c6016a4bc2bc506c528dc2c4b41956385
font_02_sfnt_off00012352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12352 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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