Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51014f89817a1bf…

MALICIOUS

PDF

89.5 KB Created: 2021-03-15 08:34:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1077637f813477a6615fbda76fb5da1a SHA-1: 8823edc823447d5e8037717ec5428b4821cfab9b SHA-256: e51014f89817a1bfc7d6390ad184ee005b43199f94f69098b13db55052e519c2
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with the primary malicious URL being https://mezovuduw.ru/strik. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=how+do+i+love+thee+holland PDF link annotation
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/8c5916b5c612.pdfIn PDF document text
    • https://betufevu.weebly.com/uploads/1/3/4/0/134098732/55a2ce2a8b.pdfIn PDF document text
    • http://pisozuzata.iblogger.org/autodwg_to_dwg_converter_2020_gratis.pdfIn PDF document text
    • https://vusimipemukebev.weebly.com/uploads/1/3/0/8/130814393/6517999.pdfIn PDF document text
    • http://pulemovidake.22web.org/guidelines_new_definition_of_default.pdfIn PDF document text
    • https://xufefizomuziz.weebly.com/uploads/1/3/5/3/135346589/5940846.pdfIn PDF document text
    • http://tuwuviji.iblogger.org/nekuwizimedefekesuzo.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/thank_you_mama_for_praying_for_me_song_lyrics.pdfIn PDF document text
    • http://zifixoribe.scienceontheweb.net/8694571488.pdfIn PDF document text
    • https://mepogazab.weebly.com/uploads/1/3/4/5/134501519/11aaff.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/listening_skills_activities_ks2.pdfIn PDF document text
    • http://kusadelopo.iblogger.org/binding_of_isaac_rebirth_free_unblocked.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/bezutuduloxaki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/how_to_respond_good_performance_review.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/wosoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/lupile.pdfIn PDF document text
    • http://witolav.epizy.com/70589500534.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/cadillacs_and_dinosaurs_game_for_pc.pdfIn PDF document text
    • http://rawobebisef.epizy.com/how_to_use_hand_pallet_truck.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/13053811729.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/58512649680.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/zepokebivoduvegoxe.pdfIn PDF document text
    • http://ruxuvejefo.epizy.com/cranial_and_facial_bones_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/catalogo_mary_kay_2018.pdfIn PDF document text
    • http://tananij.rf.gd/54426806801.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/8990223478.pdfIn PDF document text
    • http://bomajada.epizy.com/73739472345.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/duresaxewejemagizub.pdfIn PDF document text
    • http://sawokinajiralar.rf.gd/left_join_2_excel_sheets.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_off00012258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12258 4752 bytes
SHA-256: 404b0c9c44de1756e2c08f269a10020d387ef1f3522b403840a39f5ab60d52f7
font_01_sfnt_off00013291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13291 11092 bytes
SHA-256: 57178c8a0fb8ab66695c20922a2a52a00869e1429ba5ee4c62a2e1ccaf03f842

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