Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d3ab250c38fa9f…

MALICIOUS

PDF

86.1 KB Created: 2021-01-17 13:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 05657e13c181418c659433dd08039dcd SHA-1: d0b753a9f1cfda8d13db063871f46e2ec96967f7 SHA-256: e7d3ab250c38fa9f8b0d200a67492454eb200dbf593247f49c21476daa0ae636
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffmen.ru/aws?utm_term=christmas+songs+violin+sheet+music+pdf". This URL is presented as a lure related to sheet music, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL suggests an attempt to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?utm_term=christmas+songs+violin+sheet+music+pdf In PDF document text
    • https://site-1173244.mozfiles.com/files/1173244/suxubebubanutejenuz.pdfIn PDF document text
    • https://site-1179246.mozfiles.com/files/1179246/singing_machine_duet_karaoke_microphones_sam_s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482854/normal_60009faf3ff3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5fcfa520c80a2.pdfIn PDF document text
    • https://site-1177351.mozfiles.com/files/1177351/40971275227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377114/normal_5fdcb13b175a6.pdfIn PDF document text
    • https://site-1166708.mozfiles.com/files/1166708/technical_analysis_by_brian_shannon.pdfIn PDF document text
    • https://site-1172915.mozfiles.com/files/1172915/pixel_car_racer_fastest_tournament_car.pdfIn PDF document text
    • https://site-1215037.mozfiles.com/files/1215037/mediafre_software_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428035/normal_600176023d518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5fe9691d689e1.pdfIn PDF document text
    • https://site-1217406.mozfiles.com/files/1217406/luratujasiripeperedotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369911/normal_5fa5f6086b570.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
    • http://dudolisimak.epizy.com/29261678929.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/sukaxabuvewapomawujuper.pdfIn PDF document text
    • http://wosolebaxuwutux.rf.gd/samsung_refrigerator_catalogue_2018.pdfIn PDF document text
    • http://gevewodex.epizy.com/wizard_of_oz_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/pafakapuritusola.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 5532 bytes
SHA-256: bf48679748f563916e4875f5684ac348f36e85738a4e9073c59e35c022485921
font_01_sfnt_off0001038a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 10244 bytes
SHA-256: 7a85ca82ce667c4a35c96062fa2b028048163a42604e5630bac10419108e1350
font_02_sfnt_off000126e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E3 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0
font_03_sfnt_off00013c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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