Malicious PDF — malware analysis report

Static analysis result for SHA-256 880b40f6bf596347…

MALICIOUS

PDF

77.2 KB Created: 2021-02-05 14:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e230e7932b138e80f8626ed2a55441f4 SHA-1: 7d5a4c65b0c0c3696a9dd23c666bb6a00b9d442f SHA-256: 880b40f6bf596347facd0b4098e46bd3ed419288f8d1df8bf7c3d8d83befdbc6
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wb?keyword=current%20treatment%20of%20hiv/%20aids%20pdf In PDF document text
    • https://cdn.sqhk.co/zudilubal/VxjgheY/lidabubeluxum.pdfIn PDF document text
    • https://cdn.sqhk.co/gimenuxot/wfXCjfm/llama_cuba_mi_cuenta.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/rhchcji/wigodupadilefejifeli.pdfIn PDF document text
    • https://divamokavagi.weebly.com/uploads/1/3/4/8/134871471/298bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452595/normal_600b10671dc3e.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/pieBRyE/moto_bike_racing_stunt_mod.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/6e4ff3285f329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457572/normal_5fedd7773038c.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/cNM0CHH/when_was_the_first_induction_electric_motor_invented.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/mYjfjaL/37558359948.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/bEdhecj/silvercloud_byu_login.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapixuxiloko.epizy.com/android_10_update_paused.pdfIn PDF document text
    • http://diruxepuf.epizy.com/lolosenavade.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/chemistry_lab_apparatus_names.pdfIn PDF document text
    • http://jurolabadujo.rf.gd/semawemovesamem.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_off0000f12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12D 5248 bytes
SHA-256: 2e2410cfa8263bfd1677b327f6a942878ce60fdd8a73b512471a0598449ba273
font_01_sfnt_off000102e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E8 10940 bytes
SHA-256: aeee0b3677972b432ab46cb5e91320abc9888bfb2dc4fe424cf1ab2534f8b901

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