Malicious PDF — malware analysis report

Static analysis result for SHA-256 52591b6448e6818b…

MALICIOUS

PDF

72.1 KB Created: 2021-03-15 23:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3de76e34aece735dd6a44d34d7d9f19b SHA-1: b67529758417de8a029b9dcdbf515336548da7a8 SHA-256: 52591b6448e6818bb7b7441101c497505f4d7a1690b12d7d1793467302739df8
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically using an image to redirect to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL `https://mezovuduw.ru/award?keyword=biblioth%25C3%25A8que+du+quebec+pdf` is the primary indicator of compromise, likely leading to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/award?keyword=biblioth%25C3%25A8que+du+quebec+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478415/normal_5ff7d949af242.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5fced1b397331.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulelenuvi/LXhejas/97591388050.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/jdbgdhi/video_minecraft_furious_jumper_spiral.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fe0cff7258c6.pdfIn PDF document text
    • http://gozuwifaw.iblogger.org/91998158051.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/cigji9e/84786318032.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
    • https://s3.amazonaws.com/bufexa/38878635437.pdfIn PDF document text
    • http://lagamifex.epizy.com/ferulirumomokitusozefovo.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/70571326316.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/padaj.pdfIn PDF document text
    • http://nekexixi.epizy.com/python_iterate_backwards_through_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/what_is_class_action_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/cholesterol_levels_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/zekololowodosizotogevaj.pdfIn PDF document text
    • http://lovagijikem.epizy.com/xiaomi_1080p_camera_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/jevejijalawuwukupudawo.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/wodoragewowumenu.pdfIn PDF document text
    • http://wuvadik.rf.gd/tafukod.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/angular_reactive_form_validation_messages.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD96 4992 bytes
SHA-256: 33a0cf03c795d04139693bd7851f541509000ffa321f1cafb3b0fb8737e0b1c1
font_01_sfnt_off0000de54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 11604 bytes
SHA-256: d618fc4d43851ceeda83d37e4f241bf60fe5036dbd0e67e8c9e4f1c3e097db56
font_02_sfnt_off000102db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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