Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ffa996758bdf37…

MALICIOUS

PDF

71.5 KB Created: 2021-02-12 23:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 38f1efc5ee3739d4ed32a479c9a74c5f SHA-1: c875fe22f44f0a93dcf5e136a14a5ae224916105 SHA-256: 05ffa996758bdf37b4b26d12588a4db0e9e4c43037cdbe0b9807fb3eecc21aa3
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://crophysi.ru/wix?keyword=wei+jiang+transformers+devastator In PDF document text
    • https://cdn.sqhk.co/fakodozug/o1jeif2/veruguvazonab.pdfIn PDF document text
    • https://cdn.sqhk.co/xederebat/jeCDnUi/t_mobile_visual_voicemail_not_working_android.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/ge9iceP/go_karts_for_sale_near_me_4_seater.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/bizelenaju-kefukif-nuloxosep.pdfIn PDF document text
    • https://cdn.sqhk.co/pejemomet/jaGNXgG/32757026292.pdfIn PDF document text
    • http://naturaitalia.space/reformas_borbonicas_cchtqsq9.pdfIn PDF document text
    • https://cdn.sqhk.co/napefabet/jbghthh/notes_app_android_and_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/lNuPIib/62031635552.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/bakuwozofitedop_buwewuva_jokonotus.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/asxOwCq/68120928165.pdfIn PDF document text
    • http://alcozerox.com/507814809103uk8h.pdfIn PDF document text
    • https://ruxosegid.weebly.com/uploads/1/3/4/2/134265817/8070350.pdfIn PDF document text
    • https://vazewelekataba.weebly.com/uploads/1/3/1/6/131606588/c17b76.pdfIn PDF document text
    • http://afracheat2.xyz/xipumipozopxhrdl.pdfIn PDF document text
    • https://pajotesose.weebly.com/uploads/1/3/2/6/132681045/2150080.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/jjgRzih/modazivedamitopibot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC285 6588 bytes
SHA-256: 4e1a9c4cb32f1bc4ff176ae4dc1460c31b2d267bf2def0252f23ad2731e7be72
font_01_sfnt_off0000d2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FE 5344 bytes
SHA-256: 94c614e9acf6bafafbdf7dbe1425494ca1d77e0720ded2490dc0c9b417a6c89a
font_02_sfnt_off0000e525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE525 1964 bytes
SHA-256: 1d18534733479c870a78c46a90b83ed8aff410c3511f6838c5b83347f92bfa48
font_03_sfnt_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 9780 bytes
SHA-256: 40150f0185c9f168ac07a7832324712917922d263e44b9bedb9ecba558f23f4c

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