Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c06128170683eb…

MALICIOUS

PDF

89.0 KB Created: 2021-03-22 10:11:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afe3356102018fd35984e0037c37f69f SHA-1: e0eff1f939375d1e9385773aa13a225c919dd5b8 SHA-256: e7c06128170683ebeed59fe13b6ff3e2bbaf68ba3018f3c1737105b5e8707210
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. It contains an embedded URI pointing to 'https://kuzutuzo.ru/award?keyword=allegory+of+the+cave+pdf', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear textual content to indicate a specific lure beyond the URL. No scripts were extracted from this sample.

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://kuzutuzo.ru/award?keyword=allegory+of+the+cave+pdf
    • https://gudufuremozowa.weebly.com/uploads/1/3/4/4/134403830/5704893.pdf
    • https://zomudefe.weebly.com/uploads/1/3/0/7/130740133/pasede_togoliduwip.pdf
    • https://giwizakewat.weebly.com/uploads/1/3/1/8/131857916/7671321.pdf
    • http://difavusimope.iblogger.org/48805526743.pdf
    • http://fusitekive.iblogger.org/36130091578.pdf
    • https://suniponemiviku.weebly.com/uploads/1/3/1/6/131636748/9479046.pdf
    • http://siviveko.getenjoyment.net/genetic_mutation.pdf
    • http://sutovuresas.mygamesonline.org/35151089869.pdf
    • http://penexej.mywebcommunity.org/26109475401.pdf
    • https://sutulozutujak.weebly.com/uploads/1/3/4/8/134884412/93050b7a178c.pdf
    • https://cdn.sqhk.co/jujuziwe/aje0Oem/the_sims_mobile_mod_apk_unlimited_money_2019.pdf
    • https://cdn.sqhk.co/molipigi/anFhhVU/fall_race_3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kefodek/compress_file_size_to_1mb_online.pdf
    • http://gokojap.epizy.com/colocacion_cateter_venoso_central.pdf
    • https://s3.amazonaws.com/bikikanafopavu/83936580774.pdf
    • http://salesog.epizy.com/65693975174.pdf
    • http://nukigusesirujop.epizy.com/foxifitotikenimojufa.pdf
    • http://fasemejatafa.rf.gd/lijozejotadaxeb.pdf
    • http://jixolekajes.rf.gd/audio_libro_la_metamorfosis_de_franz_kafka.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011abf.bin
fdffabf15d1dfdf2024242e623b920d077f4fdb4c20ca3943cc643fe1b3b08e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABF 5388 bytes
font_01_sfnt_off00012d23.bin
630db0593147014374032dc7d74a6304357f5be5c396edd6e37b8c63b57666e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D23 12768 bytes