Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa5ed637d1bf4a4…

MALICIOUS

PDF

67.2 KB Created: 2020-12-22 22:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c1da02d057a8d896463437327ede07f4 SHA-1: 7900ed70e3fca55ede7a33fde4368152c35e1ff8 SHA-256: caa5ed637d1bf4a46aa04680598342975f3630f2e592e5b5e1bd1c30768bea63
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'Biblia cristiana evangelica pdf', aiming to trick users into visiting the malicious link.

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://trafficel.ru/aws?utm_term=biblia+cristiana+evangelica+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502236/normal_5fafed2a153f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_5fbdc59b92d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5fa0cdef68990.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365613/normal_5fc5c035b3b88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fde987dd61098631976af48/t/5fdeff11463d3b6c6f424f1f/1608449810314/mikesigulipoxaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d6a45b-5e4e-4280-9f68-03392c916015/4th_and_goal_unblocked_games_at_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b87c75f-468e-4e06-97f6-7e215997254e/2009_hyundai_sonata_repair_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdf3f2812e20d6668698b53/t/5fdf8e38ef735726d272cd91/1608486457991/transformers_2007_bumblebee_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/76836587130.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3bf9f2e34347c70560205/t/5fc55b52f8cdb769c6962b5f/1606769490440/bodadinaviw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58165f7cf8c754049f2ca/t/5fcd33bd0ab5d62febfd07e6/1607283648256/xazezera.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d4992e34347c706639b0/t/5fcf81d705f6f278075c94d3/1607434712103/31167982396.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b426df132613bbe622d5/t/5fccdfd52bc7884852b421a4/1607262166110/funon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9c274a508b35dd5dc321/t/5fdcf88c3dd71c1c14ab248a/1608317069479/album_chrisye_sabda_alam.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F7 5572 bytes
SHA-256: 30c6ac582d36b5261771b7bc43ded65b6d0084c1584103e9396c1aa98e34960f
font_01_sfnt_off0000dcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFF 10888 bytes
SHA-256: 840fba87bbf419b059dc1345ff9933d1abe5b61ef79cfb628c305da009f3a2cf

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