Malicious PDF — malware analysis report

Static analysis result for SHA-256 3062656550815fbc…

MALICIOUS

PDF

80.4 KB Created: 2021-04-09 23:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2eb913118ef6f1233a9eaf6006e912bc SHA-1: 8a0a0d9e92c0a5246da4aeb011d720610ca62871 SHA-256: 3062656550815fbc2a52273c431babf927d6c72ab7855248cbc65de56943715d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm or SEO spamming operation. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate a malicious intent to redirect users to potentially harmful content or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=john+dewey+education+theory+summary PDF link annotation
    • http://kolagozisil.mywebcommunity.org/amis_and_amiloun.pdfIn PDF document text
    • https://cdn.sqhk.co/sudizatase/fkChgia/one_more_line_cylus.pdfIn PDF document text
    • https://zezonusadife.weebly.com/uploads/1/3/1/4/131410479/vurawib_gorijipolemudup_fenewe.pdfIn PDF document text
    • http://rijewomel.scienceontheweb.net/how_to_properly_install_a_pipe_union.pdfIn PDF document text
    • https://ludefojixik.weebly.com/uploads/1/3/5/3/135347049/samelaripokivasijaz.pdfIn PDF document text
    • https://wuziwewaramided.weebly.com/uploads/1/3/4/3/134311070/3d75d4bc1195b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454694/normal_606b800f5e850.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/9559704.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/gujedalobezuxos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5ff610f9670e2.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/SFHljhM/draw_a_stickman_epic_2_pro_apk_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_60699602c3e8b.pdfIn PDF document text
    • https://wilukogata.weebly.com/uploads/1/3/5/3/135388132/dufara_dagabex_zilet.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/lekezaru/benner_conecta_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/bt_hub_5_slow_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/vidmate_video_app_install_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/fundsmith_sustainable_equity_fund_factsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/folanakivegefubexumanuli.pdfIn PDF document text
    • http://wupidusujimi.myartsonline.com/9.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/46411612176.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/fefafafik.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/jupabumuban.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/amcharts_date_format_example.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/93737969149.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_off0000f944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF944 5328 bytes
SHA-256: e0b5c05c25163352d8853ac3f7d9da869569ef51748195d6b9f7f0b773996802
font_01_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 11748 bytes
SHA-256: d79a8f4feb219ea562be9fb8d7126d90b734520fcb19f79ae997d8f2cbff228b

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