Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f32e748a224544…

MALICIOUS

PDF

81.1 KB Created: 2021-03-18 19:24:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d07a56923ab3f8c41aa3e732a5c3a82f SHA-1: 2156cc15fc362b7d224b0af35a9ae800d975c2aa SHA-256: 43f32e748a224544ca842840d706abed8d7fbf048a30253925a9462e3cf2078e
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://dafemum.ru/award?keyword=5th+wave+book+pdf+free+download`. This suggests the document is designed to trick users into clicking a link that leads to a malicious site, likely for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/award?keyword=5th+wave+book+pdf+free+download In PDF document text
    • https://cdn.sqhk.co/xivorotil/xThghhd/39878168685.pdfIn PDF document text
    • http://awpmode.com/mumelazr0ch.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/zunitijavis.pdfIn PDF document text
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/43fc6523177212c.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/84308873707.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/id5ibig/ravens_vs_steelers_postponed.pdfIn PDF document text
    • https://fumaletaseker.weebly.com/uploads/1/3/1/3/131381433/wubonoti.pdfIn PDF document text
    • http://xanevejesofag.mygamesonline.org/trastornos_alimenticios_en_jovenes.pdfIn PDF document text
    • http://italy50wow.pro/248266907364bazq.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/beach_fishing_rigs_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/tomibigi/ggoWheE/38356315674.pdfIn PDF document text
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/mexixuzegen.pdfIn PDF document text
    • https://dufavepuxafolim.weebly.com/uploads/1/3/4/2/134266173/jarinir_tuxazelonuli.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/CDRvhgg/drive_in_theater_mn_cottage_grove.pdfIn PDF document text
    • https://cdn.sqhk.co/kavonalitego/YVgf8hi/vefododoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://jokabaj.epizy.com/pavalixuferitejolakimada.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/commercial_beer_refrigerator_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/cisco_ise_2._3_admin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/fifa_score_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/59011669804.pdfIn PDF document text
    • http://weralawubuzeg.epizy.com/applied_mathematics_3_information_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/18050516168.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 5076 bytes
SHA-256: d7b3a0eddb7292ab04ad93dd47d5ccc5b28f94ad712279226db6f4d5827049ff
font_01_sfnt_off0000f5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B7 10468 bytes
SHA-256: eb4b867eccf79c729fb04a7291e6c3a2929d2e65c64eb8c7829333362ec93db7
font_02_sfnt_off0001199e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
font_03_sfnt_off0001279d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279D 3732 bytes
SHA-256: cf9465d02a4d78ddd5c1d09acf21493bac3564ba266536005c9b271e9f69deec

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