Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22cd9e695bfed15…

MALICIOUS

PDF

83.0 KB Created: 2021-01-08 08:02:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 202d370b5fe8834b27338a814b9f61f5 SHA-1: efb04c4777f4036e406eb724a9d6dff372e1c6c8 SHA-256: d22cd9e695bfed155aa9742e018a1877bd69852ed027a0b5b4fed2f4116924a7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs, one of which is flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'college biology study guide'. No scripts were extracted, but the presence of malicious URLs points to a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=college+biology+study+guide+pdf In PDF document text
    • https://cdn.sqhk.co/zexoribuj/hiibQ7K/fashion_fantasy_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_5fe6525a5fd6c.pdfIn PDF document text
    • https://cdn.sqhk.co/podadoxafa/bbhjrIw/crazy_burger_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/MX2fxjb/31304009759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/your_game_booster_pro_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024d8cc0-e1a0-42a4-a257-6af094411083/wizard101_bundle_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/guidelines_for_colposcopy_acog_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/oven_cooking_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/ernakulam_express_bangalore_platform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c5b2ed-7804-4a78-8971-4ecdc74cdfb6/wofetigitomixepodovuvito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/440e7f8b-8a9b-429a-a990-af4854a90b18/after_1_anna_todd_terjemahan.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/naliwuzenuki.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_off000109e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E8 5048 bytes
SHA-256: 05a1cf08f143cfc0d6b9871aedb88a84c15b478b2d577ab63226557a90ffe440
font_01_sfnt_off00011b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B30 10400 bytes
SHA-256: 20b008d562685c845ff9da57c4b39fdf43ff5f8cf40ad93590fb97e76120de2f

Open this report in the interactive analyzer, or submit your own file for analysis.