Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a41d222c9462f69…

MALICIOUS

PDF

77.6 KB Created: 2021-05-22 01:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9f4055df4f67bfc51c8bee0dab46d9bb SHA-1: 9f90e98d5b5dd43303ab3c5ba45452351483d11c SHA-256: 7a41d222c9462f699ec58773cf6b61e16c6963ef3287da3c509861fdab2d4928
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'baby recipes' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=receitas+bimby+bebe+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477629/normal_5fda8ebdb819c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449600/normal_5fc72f44e9138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_600090082f970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479445/normal_600ae94ecd2d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_606c42f4a21ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_600af2f3d0d80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385412/normal_5fe29ed166a4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_6052cbcd64542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459325/normal_600cbe07a33e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divikufifir/1518074725.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/saketolekisovojomeboli.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/epson_stylus_photo_1400_paper_feed_problem.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/52436716889.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/carol_of_the_bells_ssaa.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/butolimotepibik.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/lofisomerivajubexotu.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/what_cvs_are_testing_for_covid_19.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/dovaxofibizejiwokigunivaz.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/cdr_report_writing_help.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/davapavikun.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/tavebulirewa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD689 5420 bytes
SHA-256: 409455ef91eb452b3b1a06053e4e1cc03c9c3f0e8fe33b485eb7085de708eb25
font_01_sfnt_off0000e8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F6 13084 bytes
SHA-256: cc3f00ea96be325275a155f6a8ee78260dfaccd030d572f853fac331b9cf174f
font_02_sfnt_off000111fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FC 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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