Malicious PDF — malware analysis report

Static analysis result for SHA-256 722c5fced928bdc3…

MALICIOUS

PDF

83.6 KB Created: 2021-03-23 20:36:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 339081b9fea7ff3ef5328bcc157345e6 SHA-1: bb669bd5c4a695fab19fb258e839dd2a89009e82 SHA-256: 722c5fced928bdc3ddb361ab4bbc069baacf23b9dc140f819b152276ab7505ff
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 high risk score. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text suggesting a lure related to 'vitamina c para a pele pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing attempt or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/award?keyword=vitamina+c+para+a+pele+pdf
    • https://cdn.sqhk.co/wojidumezu/hjfjdif/78506654090.pdf
    • https://cdn.sqhk.co/ninulekuto/hfwIFjc/best_camera_for_live_streaming_church_2020.pdf
    • https://cdn.sqhk.co/rizinutix/cVxSLdJ/kavetimisasosexubexovoka.pdf
    • https://cdn.sqhk.co/pajokiman/buhanhe/61322731995.pdf
    • http://fakutavavuzixin.22web.org/fisusamipodulozaribos.pdf
    • https://cdn.sqhk.co/guzoladip/SPifKMi/disneyland_paris_meal_plan_top_up_guide.pdf
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdf
    • https://cdn.sqhk.co/liripudeb/xiiScPe/19881311861.pdf
    • https://cdn.sqhk.co/jotapepikota/eihQzGz/steven_universe_amino_apk_1._2._1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sefukirexuwekij/application_for_job_letter.pdf
    • https://s3.amazonaws.com/gezizefefififa/bus_165_schedule.pdf
    • https://s3.amazonaws.com/dubiditiginowo/apk_audacity_untuk_pc.pdf
    • https://uploads.strikinglycdn.com/files/8538e80b-0bc7-4049-9aff-26ecf24eaee8/94508404955.pdf
    • https://s3.amazonaws.com/geradi/sofenijeginowixe.pdf
    • https://uploads.strikinglycdn.com/files/f5f21f52-d73c-4560-9a56-d7c2346b3fc5/67360482622.pdf
    • https://s3.amazonaws.com/kisimujuk/18048754449.pdf
    • http://xutuvom.rf.gd/information_ajanta_ellora_caves_wikipedia.pdf
    • https://uploads.strikinglycdn.com/files/0a1989ff-ead3-4cc6-9d09-a17c2b529e87/sazanadekemuruxape.pdf
    • https://uploads.strikinglycdn.com/files/e5b78ebb-a236-48a1-91c0-1c52742b7f36/generac_gp3300_home_depot.pdf
    • http://limonoj.epizy.com/waterfall_model_in_sdlc.pdf
    • https://s3.amazonaws.com/mupukesunobaga/representational_state_transfer_rest.pdf
    • https://s3.amazonaws.com/jaxesabi/audio_song_bismillah_karan_free.pdf
    • https://uploads.strikinglycdn.com/files/17be8fd3-d3c5-4058-8cfa-16e4b5d95c81/rojegisope.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_off00010642.bin
215e4e3c43887d75c93be40696ab7a834042ec77bc1caad413965a0c590e96d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10642 5088 bytes
font_01_sfnt_off00011780.bin
ee029019b42545cc6ccae44e2deb9a7b7102689ea00017983a4d2f2a635534ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 13128 bytes

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