Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd2e346d1ff5b59…

MALICIOUS

PDF

81.6 KB Created: 2021-05-13 02:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e47f9d9fb6af03090cc536d47b763751 SHA-1: e52181ff61df5739a09f089878275af4dec62c1d SHA-256: ffd2e346d1ff5b597a70e66b5eba34e14c5895aa0f3c20024d80c23bd6755837
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain that appears to be a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to health information, likely to entice clicks to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wb?keyword=a%20que%20edad%20se%20puede%20tomar%20proteina PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373517/normal_60435948c1e99.pdfIn PDF document text
    • http://you-bestshop.xyz/is_walmart_tires_open_todayyp5jy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460231/normal_60053b9ad37a8.pdfIn PDF document text
    • https://rosotomana.weebly.com/uploads/1/3/4/5/134585450/4036279.pdfIn PDF document text
    • http://canlisohbetim.net/kurogirafegizumapiruparaxm7cdw.pdfIn PDF document text
    • http://cleanup-sale.site/kenmore_elite_washer_manual_he3t1kncj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450421/normal_600cc5fb5b7c9.pdfIn PDF document text
    • http://lassituda.online/758973258593nzwd.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/binulagoxumololipukumum.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/wuporu.pdfIn PDF document text
    • http://dabinepoj.mygamesonline.org/wuwakaf.pdfIn PDF document text
    • https://gakezepatirana.weebly.com/uploads/1/3/2/7/132712251/zibabozul.pdfIn PDF document text
    • http://makikupake.iblogger.org/olympiad_maths_questions_and_answers.pdfIn PDF document text
    • http://avit0.pro/nitisuzujawojumovafowuaq87w.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://vekabun.myartsonline.com/nurur.pdfIn PDF document text
    • http://nakepusigazu.epizy.com/friedrich_nietzsche_death_cause.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02603ae9-b3a8-4fd8-9877-c80742290ad4/stock_market_crash_1929_definition_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4156b52e-9b79-41df-b1c4-7375d9f7511a/ohsen_watches_customer_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf2bb42-b3e3-4ff0-886e-d6d2f3485fba/sijotivoxowapipapifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276adb49-d44d-4482-9b3b-4753d7628174/puronitokipanewim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7436842-5905-4ecc-ac05-808132f2a499/2013_subaru_impreza_low_beam_headlight_bulb.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_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 5072 bytes
SHA-256: 042fe556ed33bce4065a0d9af0c82303d81db73663feefe2f8e7e511d577e108
font_01_sfnt_off000102b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B0 11900 bytes
SHA-256: 9e21b758f586c02fc2ce877916b4c9d9b02048d5597f5b1e31e5dc65fb50ece5
font_02_sfnt_off00012975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12975 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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