Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0cb5d47c376790f…

MALICIOUS

PDF

75.4 KB Created: 2020-11-12 20:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 50b2d83257f5ddff554401ad4ea70755 SHA-1: be7b8da5d8ca491c86f054ee5ab92dcffee5d985 SHA-256: b0cb5d47c376790f1f1f7cdfe4b69866ee039722eebc42608d5d631f374937a0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?utm_term=senior+fitness+test+manual'. ML classification and ClamAV also flagged this file as malicious. The embedded document body, though heavily obfuscated, contains strings that appear to be related to the URL, suggesting the document's primary purpose is to lure the user to this malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=senior+fitness+test+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5fa52a9f68947.pdfIn PDF document text
    • https://dewisepiremutu.weebly.com/uploads/1/3/4/3/134318599/kufubaxewuna-palokizezejoja-mebilasovanofex.pdfIn PDF document text
    • https://vumevomuw.weebly.com/uploads/1/3/4/3/134335884/745154.pdfIn PDF document text
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/kiwunekuxowug.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/438bab.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/kavugusepe/super_smash_flash_flash_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d722be-91cf-4048-b1c1-0e6be15faf2a/39578539689.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/13741947713.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/20081670746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/444724f1-d7bd-4228-8238-9d2abdd79d16/29182071119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0408cb08-fce7-455d-8fd9-a8fb0ac05e29/38776642047.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD25 4896 bytes
SHA-256: 9208d1faf532aa4ca00d0a0145b429b3089485e76e0d681296131aa0eefac813
font_01_sfnt_off0000eda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 11884 bytes
SHA-256: 0c5f39347a5bf567175b847fd9a74d37b843499ae42a36890e770a5e78a27a76
font_02_sfnt_off000112b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B6 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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