Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc22d721bf2cce4…

MALICIOUS

PDF

77.4 KB Created: 2021-02-16 10:00:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 42d8a59e1c95d9c150f4f866a7a403a2 SHA-1: ec4c2141f7417e0d20e54e5378578360b5b15fdf SHA-256: 6bc22d721bf2cce480b73e672493ade2f4e8a52924d78dec8e0247a1e4c34d76
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by presenting seemingly innocuous content to mask a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://bologen.ru/123?utm_term=ernest+hemingway+best+known+books PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427080/normal_6007b212509ac.pdfIn PDF document text
    • http://avtovishki-msk.ru/personal_financial_literacy_unit_test_answers52y0k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381344/normal_5fff93ae0d9ae.pdfIn PDF document text
    • http://biolinkus.me/join_active_groups_unlimited_2020jen9g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_5fdba5348d2ee.pdfIn PDF document text
    • http://interior.estate/asus_transformer_t101ha_boot_from_usbo16ky.pdfIn PDF document text
    • http://takovod.66ghz.com/rpg_maker_free_mac.pdfIn PDF document text
    • http://gulebamabixaku.22web.org/94391310705.pdfIn PDF document text
    • http://fortuneo.biz/hentai_girls_stripuiupl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voniziveput.rf.gd/ubuntu_web_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/checkout_form_html_code.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/kekedijomaruva.pdfIn PDF document text
    • http://poravilotizeve.epizy.com/feravuvipixogisixaj.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/23063422231.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/burgundy_dress_semi_formal.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_off0000f37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37B 5424 bytes
SHA-256: e713948dc914b33ca56589e83806731b5fb716fba0957d97cf37295b94f201f6
font_01_sfnt_off000105dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 10192 bytes
SHA-256: 0c28445df5ed98095119113bcd0ca012eb280581d560a474e7d581e93cdeff88

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