Malicious PDF — malware analysis report

Static analysis result for SHA-256 07711269793abc3c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-12 02:14:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 11c4defd5f3a6a464addc50039c706ea SHA-1: 52fb000100ced3016c7b32ffe8ff30dce84734fe SHA-256: 07711269793abc3c1f9cd0a8e8d90107b88ddd02fd485fa09034edcd8945cdf8
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to external websites, including one identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to DMV test answers, aiming to trick users into visiting the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/award?keyword=ca+dmv+written+test+answers+pdf PDF link annotation
    • http://fegubel.iblogger.org/zujubumusapuvogobekabej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376875/normal_60344790d0f46.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/6igR22c/88063087203.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/dBcjhgh/vozederenagozaxamegin.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/98532138199.pdfIn PDF document text
    • http://lifipumajetug.22web.org/does_ut_use_weighted_gpa.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/guXhdxa/filibox.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/hcviJgf/varefuxewibugefonaromas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_6049352b8e5b0.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/Z4heQib/wekinoxidiruzenogusotigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_6041ce3a6bd65.pdfIn PDF document text
    • http://jologedeb.getenjoyment.net/divine_mercy_chaplet_in_song_ewtn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457006/normal_6019730482cad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488339/normal_5fd12a9911ae1.pdfIn PDF document text
    • http://bisapusid.mypressonline.com/candlestick_chart_stock_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_6023ee89f2aa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471682/normal_60150ed627b06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dunupepemogakiw.epizy.com/11931362360.pdfIn PDF document text
    • http://wijopimitiraze.epizy.com/558917334.pdfIn PDF document text
    • http://bizurano.epizy.com/587465904.pdfIn PDF document text
    • http://ximitexus.epizy.com/burma_tamil_movie_in_tamilrockers.pdfIn PDF document text
    • http://livirava.atwebpages.com/how_to_turn_on_char-broil_grill.pdfIn PDF document text
    • http://xoruxagejot.rf.gd/bernette_56_sewing_machine_manual.pdfIn PDF document text
    • http://xamunenefo.rf.gd/39491745898.pdfIn PDF document text
    • http://wutodabegaf.epizy.com/n_letter_love_images_hd.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_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 5212 bytes
SHA-256: 5474cd431542a71d48f5eb306eaf24acacb33fc90041c786c908274ba56b1114
font_01_sfnt_off00010487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 10872 bytes
SHA-256: 03a6070e58a8968e1a697302ba5b6aac8067faa378d6a0bd08f820011980a121

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