Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95e876a75d579de…

MALICIOUS

PDF

94.0 KB Created: 2021-03-06 01:33:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7e722625453ac17c70be5fda113bf7d8 SHA-1: 99f13b8e5c37f0ed202e82cae38fc501dc234c05 SHA-256: a95e876a75d579de8c4465a7e5c63ee9f4019ba66da3fb4c6da98e7703ec1c21
96 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating an external URI, which points to a URL designed to appear as a worksheet answer key. This URL is likely used to host or redirect to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/wix?keyword=nova+4402+the+nuclear+option+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486742/normal_6011335ecdafb.pdfIn PDF document text
    • http://itash.space/47604247660jjs1s.pdfIn PDF document text
    • http://pagebake.com/loginenadovujid6ltin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_602edebc2a4ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418001/normal_5fc95d4928626.pdfIn PDF document text
    • https://cdn.sqhk.co/kapumikogux/Jiejdig/one_deck_dungeon_how_to_use_skills.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/g3geo0B/17157205771.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380890/normal_60359c8d86392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5fc572c9ec6e4.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/Kshisgc/pet_rush_cross_road_game_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/gn4jeQa/castle_crashers_characters_tree.pdfIn PDF document text
    • http://fredo.bike/ccrn_review_book9na2m.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/tejuvonixag/dexamethasone_davis_drug_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/61509139195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f3d910d-e7a4-4e6c-ba52-e3a86f4bcdbe/vovev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64929303-7ac0-4179-8bbe-28e386694e25/d-link_dns-321_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/32446913812.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/tiwibubafebopozabex.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/19004984176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40fdc9c7-27b7-4237-a5d4-b4c0ba4ce045/97676016751.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A4 7044 bytes
SHA-256: 79978a6630ea1bb6ec72345e09d71b716a0da67e6d883f7e9d2fbd6f73d47965
font_01_sfnt_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 3048 bytes
SHA-256: b903261f2e2350152439773ca1702294038377e852de065cb6d2bf178f9503dc
font_02_sfnt_off00010356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10356 5568 bytes
SHA-256: 3db5fb07c4531846196683159d4b2f91abb9bd7b4b2f153ce6a8d6daf9f4c2e1
font_03_sfnt_off0001165a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165A 1648 bytes
SHA-256: 2caeb454a93b18584067451a2b12acb77e4a50455da74f41c574601843ce0219
font_04_sfnt_off00011e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9E 15212 bytes
SHA-256: b92e19facb77d7639279b4b4bf5ee634f7fa3bf1be0a348fcf8a3a75f5bf0cb6
font_05_sfnt_off00014e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E4A 18180 bytes
SHA-256: 9aed1e7351bc6446af2decac2b7b1988d7d586c26753526b62d46108801f44da

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