Malicious PDF — malware analysis report

Static analysis result for SHA-256 de835c1f0afcf750…

MALICIOUS

PDF

80.3 KB Created: 2021-02-13 05:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b350db70ae73f6b3e1083a0199dfe4b3 SHA-1: 936766ec4f960d0550ac426a60028a1771a46a83 SHA-256: de835c1f0afcf750546dc2d1487541e3fac20d575b94da2fb03c30c5789d792a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to audio editing software, suggesting a lure to disguise the malicious intent.

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://maypoin.ru/wix?keyword=make+audio+louder+sony+vegas PDF link annotation
    • https://rotasemenedifo.weebly.com/uploads/1/3/5/9/135985080/a4d54df7e4ea.pdfIn PDF document text
    • https://regifedemez.weebly.com/uploads/1/3/1/4/131406591/601983.pdfIn PDF document text
    • http://worldthailand.fun/informacion_del_billete_de_100_lempirasj414h.pdfIn PDF document text
    • http://yoptan.space/102167835837mb9s.pdfIn PDF document text
    • http://prizinsta.info/govebitusigedipabevomip3pn45.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/77b348559b.pdfIn PDF document text
    • http://menawamuno.iblogger.org/paditiwu.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/jodabiladezot/82699329220.pdfIn PDF document text
    • http://lamujep.rf.gd/30599807228.pdfIn PDF document text
    • http://tafujeloraxofo.epizy.com/7862974777.pdfIn PDF document text
    • http://vogizopenukese.epizy.com/bonefish_grill_menu_nutrition_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/jiwelu.pdfIn PDF document text
    • http://kakekevuvek.epizy.com/1109967981.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/radagewupa.pdfIn PDF document text
    • http://wosaxadef.rf.gd/genital_herpes_in_pregnancy_nice_guidelines.pdfIn PDF document text
    • http://gagipuriligeme.rf.gd/narakepewakawur.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/dafowavamajabiminupebinuf.pdfIn PDF document text
    • http://kedixiravupit.epizy.com/steelhead_fishing_report_snake_river.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 5224 bytes
SHA-256: e2aee879f269325c83816f57cb63a9d0ad8a8bf0f9f694991f3a671066b15f95
font_01_sfnt_off0000f252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF252 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 10240 bytes
SHA-256: e3cf639e5293bf9beb3289230ef662a43a81e7a25b4a54e5e4e8619d52a0a3c8
font_03_sfnt_off00011e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E12 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b

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