Malicious PDF — malware analysis report

Static analysis result for SHA-256 0717dd4b59a2e2f1…

MALICIOUS

PDF

71.4 KB Created: 2021-03-12 21:13:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f777a2a6a2e12770a6deb149430bd596 SHA-1: 5db3d94db61d5055ffcd145fcc1915034fc731f0 SHA-256: 0717dd4b59a2e2f1972ee0398385db651f2010cc00e3e81d2f432209fc1e2720
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though obfuscated, references 'Codycross answers group 125 puzzle 5', a common lure for phishing campaigns.

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://nipisod.ru/123?utm_term=codycross+answers+group+125+puzzle+5 PDF link annotation
    • http://majidadap.22web.org/nuxumepaxidofugebebafo.pdfIn PDF document text
    • http://goodnaturak.space/get_off_my_planet_game1ki6f.pdfIn PDF document text
    • http://xaloripefe.22web.org/champion_dual_fuel_inverter_generator_price.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453718/normal_5fcb4ef98e9d2.pdfIn PDF document text
    • http://pedugubugof.mywebcommunity.org/etf_tipping_point.pdfIn PDF document text
    • https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/lumebopekaxok_buvidujubo_mokegux.pdfIn PDF document text
    • https://wewokidopubix.weebly.com/uploads/1/3/0/8/130873978/bamudirugazobid_wixajusi.pdfIn PDF document text
    • http://redofokotab.sportsontheweb.net/benefits_and_risks_of_artificial_intelligence.pdfIn PDF document text
    • https://lakafirawitekir.weebly.com/uploads/1/3/4/0/134018328/6958561.pdfIn PDF document text
    • http://all-system7.xyz/beat_tiles_rhythmatic_tap_apk6vjak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_6034c1579a9bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5fdaba31a8add.pdfIn PDF document text
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/laxalo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470380/normal_5fdd922465f51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/eye_catching_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/mopiwejemapikegeluduboxag.pdfIn PDF document text
    • http://gapisoga.rf.gd/journal_entries_practice_problems_with_answers.pdfIn PDF document text
    • http://pakekaririwofas.rf.gd/ffxiv_gathering_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/easl_hepatorenal_syndrome_guidelines.pdfIn PDF document text
    • http://pavafisufopu.myartsonline.com/27825822579.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/bin_sachivalay_clerk_2016_paper_answer_key.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_off0000da01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA01 5696 bytes
SHA-256: 9a0626a222dc6cf1059a0aaa8870a40f7e754c77daee615209481159720250aa
font_01_sfnt_off0000eda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 10024 bytes
SHA-256: c1cf526a4b191e00308128f3b405aeb94ddae61e435c97ff3efed3b559c675c5

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