Malicious PDF — malware analysis report

Static analysis result for SHA-256 7021564a8c5032e7…

MALICIOUS

PDF

79.8 KB Created: 2020-12-15 20:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cf9ae695ef944cd124a735dcc79d4080 SHA-1: bd5fc4dab8d4767234d82c50ee764466d13f7fec SHA-256: 7021564a8c5032e7c9131d4e115d5950b9f6d01cb66d69c8bed38dcce8c73b59
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are to benign-looking PDF files, but one prominent URL, 'https://trafffi.ru/123?utm_term=que+se+abra+el+cielo+acordes+g', is flagged as unknown and is likely part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?utm_term=que+se+abra+el+cielo+acordes+g PDF link annotation
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/0df15a97391266.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/766597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f8c0f2d97ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5f88f684a359d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374980/normal_5fca143d57a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5fa5dc9f94193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_5fbd3ef8dbf2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493881/normal_5fce3dab9ebb6.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://static1.squarespace.com/static/5fc0c67840f1034a5ca82603/t/5fc3766d3570fb44d16f7f35/1606645360694/apk_para_baixar_musicas_do_youtube.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0052111f6a4198480c96b/t/5fc112b618e72e5fdbfd6161/1606488759280/9.3_rectangle_rhombus_and_square_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfc2561e25426e1fee97a/1606286377352/73839294611.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53be8ab79f442f245f56c/t/5fcbb8076e74d26c6f057f9c/1607186440968/oneguard_panic_button_crossword.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed17f7cf8c75402b0ccf/t/5fc3b63a2dd96f59185f42dd/1606661691049/14295490458.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc39e3c5e8e827d429ee1bf/t/5fc70c7a1d689b68bf925bb7/1606880380707/kika_edgar_hija.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAF 2960 bytes
SHA-256: ba9dd86ad06677ef82b9fc66565cbe1db364e5caa8fb73f24ce3e10b7ab9a08b
font_01_sfnt_off0000d532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD532 5004 bytes
SHA-256: 4c459ad2f02aa92fe0127d13377cd3390927079ca3f490103b377af7de7a4977
font_02_sfnt_off0000e634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 11856 bytes
SHA-256: eb42b33988f866356847a58aa9170615d49e3584a4bdb2bfaa5b5f59b407b747
font_03_sfnt_off00010d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
font_04_sfnt_off000121c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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