Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d8180953425370…

MALICIOUS

PDF

78.0 KB Created: 2021-04-08 14:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3f7c65d627bf0ee9fc41f3f0ec7bc04 SHA-1: dbf8cb529ee3556cbaa54b5deae19cb838da9945 SHA-256: 38d8180953425370e7f6f95b025a078a9028ea02c0582f043d895a8e08aa95be
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 critical detection of 'Pdf.Phishing.Trojan'. It contains an embedded URL pointing to a suspicious domain, likely intended to host a phishing or malware payload. The document body, though heavily obfuscated, suggests a lure related to 'Citizenship in America worksheet'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=citizenship+in+america+worksheet
    • https://cdn-cms.f-static.net/uploads/4459477/normal_601907fb906da.pdf
    • https://gunujudota.weebly.com/uploads/1/3/2/3/132303168/1505267.pdf
    • https://pigaxapi.weebly.com/uploads/1/3/2/8/132815084/piwivexilov.pdf
    • https://vopilejuwe.weebly.com/uploads/1/3/1/4/131407469/7420827.pdf
    • https://cdn.sqhk.co/nikofejujel/ip2wBgi/hatoful_boyfriend_plush.pdf
    • http://kojijeku.mygamesonline.org/diagnostico_educativo_segun_autores.pdf
    • https://cdn-cms.f-static.net/uploads/4450043/normal_6020afb17901e.pdf
    • https://cdn.sqhk.co/libudezetuv/dhagdk8/wamulebededusojenole.pdf
    • https://cdn-cms.f-static.net/uploads/4470526/normal_601ee7ff18a23.pdf
    • http://nezatarofarix.getenjoyment.net/dictionnaire_gologie_anglais_franais.pdf
    • https://zalirojojates.weebly.com/uploads/1/3/4/6/134606979/gilolelafofuti_kofubak_kidufaxija_zoluxewexemaxat.pdf
    • https://cdn-cms.f-static.net/uploads/4377120/normal_601601772ceae.pdf
    • https://cdn.sqhk.co/wasefago/Z0qia5Y/granny_smith_full_version_apk_free.pdf
    • http://wotimose.getenjoyment.net/babcock_and_wilcox_boiler_download.pdf
    • http://gepopusoka.mypressonline.com/34192550899.pdf
    • https://cdn.sqhk.co/sevijeruba/mFzTjbf/63128709639.pdf
    • https://cdn.sqhk.co/xadeviro/FPJCHgf/74232056183.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/324338c4-1a38-4f7c-8f7e-968a2bc88102/36933702041.pdf
    • https://uploads.strikinglycdn.com/files/6ba5cbf4-7d25-4e07-9fe7-253fbc1a11ba/act_pathology_book_online.pdf
    • https://uploads.strikinglycdn.com/files/38878938-5146-448c-a926-354a4eba16f4/what_order_does_the_fallen_series_go_in.pdf
    • https://uploads.strikinglycdn.com/files/bd03a43e-4a2c-4ec8-b083-d47a89d4a608/how_to_use_tv_input_on_xfinity_remote.pdf
    • https://s3.amazonaws.com/bisiku/wazupisesulizizin.pdf
    • https://s3.amazonaws.com/fizup/cuisinart_keurig_coffee_maker_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/4e229ca0-63ff-4f8f-bbf4-ddbd217d064f/16070233500.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_off0000f369.bin
04130cae3aaae583d0d28860c88629917be7aa110d0a24b44d8641628f958fda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 5252 bytes
font_01_sfnt_off0001052e.bin
6c54d800dcfc7a2c163abaeed38caf59ad97d903dff61fd85fdd4cbe401f857e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1052E 10504 bytes

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