Malicious PDF — malware analysis report

Static analysis result for SHA-256 509314aea729b503…

MALICIOUS

PDF

69.1 KB Created: 2020-11-11 07:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f2abbcf02a16d4b6228f013bf9b6275b SHA-1: 12e13fb694881a1a4c4053ba98de610b0863570c SHA-256: 509314aea729b503864762c78c1ae49ff2f031c1b88fe58b807ffc1512e6e78e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?keyword=mr+brown+iced+coffee PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405409/normal_5f92a192500cc.pdfIn PDF document text
    • https://tipezigixak.weebly.com/uploads/1/3/4/3/134339593/defdcf0403197f.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/wedenenerufajizej.pdfIn PDF document text
    • https://wubiwadodeta.weebly.com/uploads/1/3/4/5/134577579/kuwofulitafakuf.pdfIn PDF document text
    • https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/564f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/10db38b1-375a-4164-a7cd-047f10aa33e4/golden_sun_class_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/playbox_hd_apk_file_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2661f02-2332-4490-9fc8-dc925fcd1bdf/31781364763.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/2269891398.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/56155266342.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/applied_optics_book.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/kenesegebibas.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/37658133328.pdfIn PDF document text
    • https://s3.amazonaws.com/wepeliniru/yamaha_rx_v_377_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/rome_iv_functional_gastrointestinal_disorders.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_off0000bb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7E 3304 bytes
SHA-256: b169fab7e95feb92572efc9df031e0021b01ac1812e258296d80a975a2d52bc6
font_01_sfnt_off0000c75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75E 4832 bytes
SHA-256: 13ead31ecd3ea9ab77cedff37f1158faea54410df1ab702319b212388942ba3f
font_02_sfnt_off0000d7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FF 15176 bytes
SHA-256: 8e05169d36a1cff98a3d68813586415ff6cf039b0f1810b5e74fbfbd02fc5351

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