Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca69ff154445c7ec…

MALICIOUS

PDF

76.9 KB Created: 2020-12-20 04:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 827e620f5505a5702c343fb8a4b44987 SHA-1: 19f3b1868e0dc6ca5acf15f85138d867350b57fd SHA-256: ca69ff154445c7ec9226fa82bd134f1a26a73d4e48250071b1de82d600e69429
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafffi.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or trick the user into visiting a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=apollo+13+strain+seeds PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393026/normal_5fa24111ba369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5f9db6e244c60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410207/normal_5fda8e51577da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_5fda5c2f03ce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_5faa6fa220ac3.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/5fc4fe50c30a162e0c6cbe8c/t/5fc520a13c6ccf69f302b31b/1606754465866/dish_lnb_frequency.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2f52c6de34c7a37e93e/1606218486749/case_files_obgyn_5th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/multiplying_using_lattice_method_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/l_adjectif_numral_cardinal_et_ordinal.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc108971c8c7413143284ac/t/5fce24242fa8bc6bcd11e3b0/1607345189666/vibozumunorizifu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ed9eaf37e3b6492488d/1606373081804/10677728300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ef9fd9-5cdc-4ca3-b97c-661cfbe5edf5/yt-_1300_freighter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe010e7acac6192a86f6ee/1606287649803/66188001995.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/36836489316.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d8d416f6d44b07d7d45f/t/5fc629d49b1ed03538b01278/1606822356295/royal_farms_arena_wwe_raw.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_off0000e215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE215 4948 bytes
SHA-256: 82efc3a8bb8309c332cd8c204500d6a509cf1040050d3f864afc84e5a70f0b64
font_01_sfnt_off0000f2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E8 11036 bytes
SHA-256: ad116810c60adb49f7b5a0f2d95feb68d58997c0f55f1a61de89adbcfc03d57c
font_02_sfnt_off00011878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11878 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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