Malicious PDF — malware analysis report

Static analysis result for SHA-256 4895707e28502997…

MALICIOUS

PDF

65.7 KB Created: 2020-11-11 20:50:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 356d8fccf9a1a1a19e5f00b6238bdd83 SHA-1: 9328b3a0945d1433d69a47aafb2ecf1e123a9d64 SHA-256: 4895707e2850299799a850d70aa39470fbfc42999a798ac86a9d7d9960b5ccdf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'Blippar mod apk', likely a lure to entice users to click the embedded malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffine.ru/aws?utm_term=blippar+mod+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f98dc3a5b401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_5f8a84375fedd.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://uploads.strikinglycdn.com/files/8c041d8d-cc40-4381-8aba-aae59bf70776/exeter_math_1_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/katie_s_corner_farina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c18454-50d6-4575-9bfa-5ea6bfe5d7a5/fnaf_2_toy_animatronics.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/solaray_yeast_cleanse_side_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/sticky_ninja_games_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/wudimorixuguvujone.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/words_start_with_ini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c548f8-20fa-4140-9350-c8d5f1d0ff05/morphological_chart_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/fbpe_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/budapest_convention.pdfIn PDF document text
    • https://s3.amazonaws.com/pofumapetat/foul_shot_poem_analysis.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_off0000b8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C2 4524 bytes
SHA-256: 77d8a5716922fe5e6c7192a2ad9525b2bb9e8b2b919dac1a796dfab2c31754c1
font_01_sfnt_off0000c809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 10644 bytes
SHA-256: 692f68541c9a83d84d97e13441afb3ce99f16612c44101ac5aea2997e5cab38c
font_02_sfnt_off0000ec41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC41 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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