Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1514187df9e3b3…

MALICIOUS

PDF

78.9 KB Created: 2021-04-14 05:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 223e3b25736d7daee316ed262e675e6d SHA-1: d21a6996ccea0321acb07783d40193aad558bcfb SHA-256: 8f1514187df9e3b3094ac07d4d6fee0e897e857810ad2b08f2a9ed4311378243
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating it is a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, references 'The wind in the willows movie' and the wkhtmltopdf application, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=the+wind+in+the+willows+movie
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/a5e3f2f.pdf
    • https://nimawotamuxagop.weebly.com/uploads/1/3/1/6/131606149/texasixirizovekiloz.pdf
    • http://duzixofiwisegi.mygamesonline.org/major_causes_of_unemployment.pdf
    • http://lifeshop.pro/elfster_secret_santa_shareable_wishlist_app_storeodygs.pdf
    • http://xuroriwonufuz.scienceontheweb.net/84600383638.pdf
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/8194852.pdf
    • https://pelosewedi.weebly.com/uploads/1/3/4/7/134753512/rebawudikomasem.pdf
    • http://copyright-rules-help.com/elgato_hd60_pro_device_not_foundx5xva.pdf
    • http://easycreditscore.info/weginedajiraxanakisiiic4q.pdf
    • https://gipebikurowa.weebly.com/uploads/1/3/4/0/134095939/e34fb2674.pdf
    • https://wufewevaso.weebly.com/uploads/1/3/1/4/131453291/ruxajitaronoxo_ruluzogugaden_vazozew.pdf
    • https://bikezurikol.weebly.com/uploads/1/3/4/6/134612173/7558450.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lixuduwonifa/73165770436.pdf
    • https://s3.amazonaws.com/xisakazelelinim/fighter_dnd_5e_guide.pdf
    • http://rejaramexalib.epizy.com/seamus_heaney_beowulf_old_english.pdf
    • https://s3.amazonaws.com/xidazeze/wexagokekisos.pdf
    • http://tepuxomer.rf.gd/75769879078.pdf
    • http://pekapajekuxipuj.rf.gd/49476349244.pdf
    • https://s3.amazonaws.com/kalanejaxutilif/how_to_clean_graco_nautilus_3-in-1_car_seat.pdf
    • http://gebuzabode.epizy.com/xejusaxumif.pdf
    • http://jutagejefutix.atwebpages.com/cameroon_anglophone_crisis.pdf
    • https://s3.amazonaws.com/mixanaz/pie_persuade_inform_entertain_poster.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_off0000f7bc.bin
a2f661cd177eff31b9baaf0b267b6fc27542bb48b03dae5cccaea90b93f7183c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 4860 bytes
font_01_sfnt_off00010834.bin
87b9b53e068f725cec0d12ef11e49c825cbcb20a39908634793f2fb82c617c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 11076 bytes

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