Malicious PDF — malware analysis report

Static analysis result for SHA-256 603f7547e3027db6…

MALICIOUS

PDF

79.9 KB Created: 2021-03-14 23:39:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7effa3bdd3ae0168e0fe7ca32d6b8303 SHA-1: 7a1ad694461b0f4522c237f707df63cc0b1e0560 SHA-256: 603f7547e3027db65ecc33e7e23973cc9667e5dd55df1e0d98f9f45eb2d72d8e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URL, https://golowaki.ru/wix?keyword=lehne%2527s+pharmacology+for+nursing+care+10e+pdf, suggests a lure related to a pharmacology textbook, likely to trick users into downloading a malicious file. No scripts were extracted, but the PDF structure and external URL are strong indicators of a phishing attempt.

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://golowaki.ru/wix?keyword=lehne%2527s+pharmacology+for+nursing+care+10e+pdf PDF link annotation
    • http://xelamoxadavas.mywebcommunity.org/best_restorative_yoga_poses_for_back_pain.pdfIn PDF document text
    • http://gifinibufenatar.medianewsonline.com/46005559397.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/kuvegubuvusaninaxogexodo.pdfIn PDF document text
    • http://tirudibemaj.22web.org/what_is_organisational_culture_in_hrm.pdfIn PDF document text
    • https://xesinuvukuwufo.weebly.com/uploads/1/3/0/7/130776104/puzurulo.pdfIn PDF document text
    • http://manovina.mypressonline.com/33110616160.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/6874160.pdfIn PDF document text
    • http://fodagikegabafak.iblogger.org/agnes_martin_lugand_une_evidence_gratuit.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/71521132694.pdfIn PDF document text
    • https://lekaretuzej.weebly.com/uploads/1/3/0/7/130738752/7f4cf09.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/nubepamovuzaku.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/mathematics_for_economics_and_finance_anthony_biggs_download.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/how_to_open_lg_washing_machine_door_mid_cycle.pdfIn PDF document text
    • https://saditifoba.weebly.com/uploads/1/3/5/3/135325123/zefefaxefodibiv.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/ti_84_plus_ce_pokemon_red_rom.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/dark_blue_dress_coat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nokarox.rf.gd/dobusakema.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/96764257885.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/how_to_connect_a_hp_deskjet_to_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/zizomupize.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/xapak.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/beholden_to_the_throne_epub.pdfIn PDF document text
    • http://wufizomofoduzin.rf.gd/flamebreaker_armor_guide.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/abrg_des_marchs_financiers_2020.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF621 5840 bytes
SHA-256: fddea707bca566c56d5aa1ecd0a78751e87b9b53b15650c54f73dccf90a7149a
font_01_sfnt_off000109f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F8 11288 bytes
SHA-256: 5f8331f6d4795a5fa446d7d6e7332b536715b63b80c6038ff794321125134ddb

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