Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6152fc6aa8244bf…

MALICIOUS

PDF

73.8 KB Created: 2021-05-02 05:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: adaa3163ca375606e0428b147d99e7fe SHA-1: a8c9d98c1a7e25ec42c8176c9d93fb3e60cfca40 SHA-256: e6152fc6aa8244bff3090ba3448b64933855a7858c422569dd8b2310738fa6cc
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing attempt. The primary URL, zajinet.ru, is presented as a search result for a query about hidden fees, likely a lure to direct users to a malicious site. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate malicious intent, possibly involving JavaScript execution or redirection to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=does+planet+fitness+have+any+hidden+fees PDF link annotation
    • https://jupavovol.weebly.com/uploads/1/3/4/3/134314217/794b6b0bceed89.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/BSgegiU/the_original_play_phone_number.pdfIn PDF document text
    • https://lowijagaji.weebly.com/uploads/1/3/4/3/134394878/xegarogujix.pdfIn PDF document text
    • http://kasyanbeauty.com/bavikix51x0n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369191/normal_5feb9ee7bfdda.pdfIn PDF document text
    • http://hotloveme.online/burijou2a4.pdfIn PDF document text
    • https://cdn.sqhk.co/jiloduvunilu/b5jbhfv/sago_mini_pet_cafe_apk_indir.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/56299435121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5fe64a9ead9fd.pdfIn PDF document text
    • http://reduslim-siteofficial.site/how_to_save_google_maps_onlinegttif.pdfIn PDF document text
    • http://shop-profildoors.ru/pride_and_prejudice_1995_full_movie_watch_onlinew8gto.pdfIn PDF document text
    • http://thecet.xyz/68934509539bppyz.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/woxorojero/how_to_go_to_the_boiler_room_re2.pdfIn PDF document text
    • http://vexolofifete.atwebpages.com/optimate_4_tm_350_dual_can-bus_edition_para_bmw.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/smart_goals_worksheet_for_elementary_students.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/65975060869.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/badekafedajupunopufo.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_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 5192 bytes
SHA-256: 79658e71379b34a2980153f75d81c9ac73c1965f17a0ee2880f0956dc5db9c9b
font_01_sfnt_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 11192 bytes
SHA-256: 4624d4f90e82a6216e9944daa1245e39f3e675db3e33742d3f9f5986b00ae42c

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