Malicious PDF — malware analysis report

Static analysis result for SHA-256 6936380386802e30…

MALICIOUS

PDF

75.6 KB Created: 2021-01-28 08:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c3394e239f9b3210bf41d5cc75e3f19d SHA-1: 1aec8b12fcf796a9476fa25838ba57b9cd6ed596 SHA-256: 6936380386802e30b135b903087a71c72572a06e89a8831c2e7e0019c16cc9ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document contains numerous embedded URLs pointing to a link farm hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. The presence of external URIs and the link farm nature strongly indicate an attempt to redirect users to potentially malicious content.

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://leonvi.ru/123?utm_term=luxury+shower+curtains+with+valance PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fca6ea4b85fc.pdfIn PDF document text
    • http://malalij.iblogger.org/biceps_tear_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/iNQFwjf/heartstart_hs1_battery_charger.pdfIn PDF document text
    • https://serofewaz.weebly.com/uploads/1/3/1/3/131379274/c6f94e6f0944.pdfIn PDF document text
    • http://astrology-personal.online/dezoputpl8yi.pdfIn PDF document text
    • http://gevixadita.22web.org/volaruvadibufosonas.pdfIn PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/f03f8fadca35.pdfIn PDF document text
    • https://fexedewikefitug.weebly.com/uploads/1/3/2/6/132681233/tusigotetejowuk_sifoja_zigitojinotoke_dulitivarozigus.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/chjdSjj/twisted_tea_light_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_5fe9b4690b1fe.pdfIn PDF document text
    • https://xepezexitig.weebly.com/uploads/1/3/0/9/130969834/mafuxusadoka-xurilifurene.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/g2hgTjf/pulsar_220_sales_in_chennai_olx.pdfIn PDF document text
    • http://tur8osale.site/chatous_3._9._85_mod_apk0x9tk.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/3ifgfR7/rosonomoj.pdfIn PDF document text
    • http://depotupunejiwo.iblogger.org/poruzowijoximufi.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://kuzojepume.epizy.com/arabian_nights_1974_full_movie_free.pdfIn PDF document text
    • http://bemerolafun.epizy.com/43113578360.pdfIn PDF document text
    • http://wepinipinalojud.epizy.com/36854627296.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_off0000daa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA2 5032 bytes
SHA-256: 37e9dabdb51d5e47b51ba1b3bfbf13f0e2e7949cae7033a758f37b6993d53d6e
font_01_sfnt_off0000ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD8 11568 bytes
SHA-256: 2b45f4d5d4a3a7d9c1e0db3dfd7d4e0a480465d5a24cbbe07e54a7c17d44cca3
font_02_sfnt_off00011315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11315 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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