Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a32755eb29971a…

MALICIOUS

PDF

71.6 KB Created: 2021-03-14 02:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b90ba87bdfb4b542331dfe00cc679e69 SHA-1: 20f304332dc08ca1e96d16adab23d2025a212552 SHA-256: 70a32755eb29971a44720e3ab8a983038b20ab518c9329bdd43ae26da908de3d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/wix?keyword=day+3+grade+8+social+studies+staar+review+constitution+answers
    • https://cdn.sqhk.co/defisepeniba/bHSjggd/pet_shop_near_me_open_now.pdf
    • http://sutovuresas.mygamesonline.org/75426677994.pdf
    • https://cdn.sqhk.co/kupujape/if12UIZ/46649282619.pdf
    • https://balexasureg.weebly.com/uploads/1/3/0/8/130874281/nopiw.pdf
    • https://fuvapele.weebly.com/uploads/1/3/0/7/130738919/393276.pdf
    • http://pexarinolal.mypressonline.com/elder_scrolls_online_build_sorcerer.pdf
    • https://cdn.sqhk.co/vewukiziwemi/RKqidDj/wwe_bleacher_report_raw_live_results.pdf
    • http://nogurufegu.mygamesonline.org/31282793564.pdf
    • https://cdn.sqhk.co/konafomaz/5jFhj8f/92045897898.pdf
    • https://wavikifetin.weebly.com/uploads/1/3/4/9/134901048/nitinevojixomezod.pdf
    • https://cdn.sqhk.co/mesafovojifo/aKS1Qjg/main_street_pets_haunted_village_ghost_town.pdf
    • http://ririzobe.medianewsonline.com/pevabivonoworana.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_06c0f7078e174532803835afdaa84274.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2cb1bb15-4958-44a3-a403-edd978d6ebba/jujarozogomudorexe.pdf
    • https://uploads.strikinglycdn.com/files/7a358abd-2bf6-4a87-b12c-7baa6fc3959b/how_to_upgrade_garmin_nuvi_200.pdf
    • https://uploads.strikinglycdn.com/files/f7fac81e-aa60-473a-9756-cacc84f71912/28207314347.pdf
    • https://uploads.strikinglycdn.com/files/a5408f8c-dcf4-4d48-a993-d8e03f1dce22/56241178437.pdf
    • https://uploads.strikinglycdn.com/files/b33b5d0f-de68-4a30-bfa0-101cf2118124/what_common_food_items_have_gluten.pdf
    • https://uploads.strikinglycdn.com/files/3d025ce8-451b-4cae-aec6-e5dd8373aa31/towus.pdf
    • http://jotudokizer.onlinewebshop.net/41565021277.pdf
    • https://uploads.strikinglycdn.com/files/393df6e8-6e1f-4df6-894d-2414466d5314/93314477496.pdf
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_ab44e135aad243e8b84656c667594a6d.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd88.bin
b28fcbcd5cc0c0b13674cf4619d24218264efdf220975f4b46697388ede7f95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD88 5600 bytes
font_01_sfnt_off0000e0b0.bin
4d4ed4672dd0a6c7c6bab956d05561213f9cf9d6c53e52c5588047af41d552c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B0 10272 bytes
font_02_sfnt_off0001034a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1034A 4324 bytes

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