Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe93d65d225114ac…

MALICIOUS

PDF

77.7 KB Created: 2021-01-20 14:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 79d8df58de5d8dea1b1690cc37f7eb04 SHA-1: 268aeed1d0eca52bcd1ca46d2c2ba29dd525de8d SHA-256: fe93d65d225114ac5bf732dfefebe8bdd72e5f38f90533529f2a41eaa37e060d
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a redirector to known malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to resume templates, suggesting a lure for phishing or malware delivery.

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
  • 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 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/123?utm_term=fashion+designer+resume+template In PDF document text
    • https://site-1171661.mozfiles.com/files/1171661/99004936875.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/jdiigji/27497998995.pdfIn PDF document text
    • https://site-1177531.mozfiles.com/files/1177531/11868944284.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/hdhghc2/bipedirukotitutolix.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/fPiighg/cut_and_paint_mod_apk_vip_unlocked.pdfIn PDF document text
    • https://site-1252467.mozfiles.com/files/1252467/bticino_living_catalogo.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/heeiiE8/37721995940.pdfIn PDF document text
    • https://site-1259396.mozfiles.com/files/1259396/breakup_couple_wallpaper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366319/normal_5fe3eb03e4029.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/yYihKhh/word_cookies_cross_salted_butter_14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisowafoz.epizy.com/free_invoice_template_word_2003.pdfIn PDF document text
    • http://rulumagevamed.epizy.com/guided_reading_lesson_structure.pdfIn PDF document text
    • http://natadomemorad.epizy.com/87489690107.pdfIn PDF document text
    • http://vudatuvabejosix.epizy.com/pofumofadixisopopu.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_off0000f348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 5328 bytes
SHA-256: ac6c609478ec864ca54da9a31d41de7ef341f661c5be6235d6e92ccf9f60a7db
font_01_sfnt_off0001053e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053E 10716 bytes
SHA-256: 12c12fa1cfa66d21851b5d4cc60a81e1b4708a1406f2784c07ad953807494eb8

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