Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0ecc271f057e25…

MALICIOUS

PDF

86.7 KB Created: 2020-11-21 23:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2f4208eebe74790e80186f9cd9431e8d SHA-1: dfeeaec92ab59d32ceb537e16b814122916d8f5e SHA-256: 5e0ecc271f057e259a56ae13fdf86fc93ac7a7bcd924db64c2eab1e5d60c5b9d
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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?utm_term=the+walking+dead+season+1+hack+apk+download PDF link annotation
    • https://dibulikari.weebly.com/uploads/1/3/4/2/134235408/fe9ecdccd2579.pdfIn PDF document text
    • https://lagepelod.weebly.com/uploads/1/3/4/7/134716456/f4c69ece84bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f8d3fcbb959b.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/ninazarila/invisible_war_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/coldplay_scientist_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac8756cd-a342-4ad4-842c-d50510300a50/43962380906.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/which_of_the_following_is_a_factor_of_production_a_sofa_produced.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/ahsanul_bayan_hindi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/ap_biology_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/tubeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd25b14-8eef-4074-88bf-73b27ad0b497/rilomekanakaroseze.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/alt_binz_0._25_0.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010bf5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10BF5 27932 bytes
SHA-256: e15a97cba8bfa466d5ac143e2de684876b4fa1b5aa2cb8c513b1eb806caa154b
font_00_sfnt_off0000d3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CE 5104 bytes
SHA-256: 6ebb28bd96cd0ca13ce23fbdae927a7604db0a3696683ac9e1bff8bf6aebef75
font_01_sfnt_off0000e535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 11940 bytes
SHA-256: f52cdf2302022556b14d5a1d3aa5eadb4fcfde225b3057fc1769f0f7d923fa2b
font_03_sfnt_off00013d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D57 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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