Malicious PDF — malware analysis report

Static analysis result for SHA-256 778273a3c148569e…

MALICIOUS

PDF

75.7 KB Created: 2021-05-01 20:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5ea10ebdd06d2cb9506e3fcb091588d SHA-1: 668f1b901166b5163dad748c96250c889c71f78d SHA-256: 778273a3c148569e7cdefd20854aeb2dc48a9b710d86be931faa0fb794facb91
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it is part of a link farm. The embedded URL 'https://gimoguvi.ru/strik?utm_term=wordpress+username+and+password+not+working' suggests a phishing or scam attempt related to WordPress credentials. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the overall structure and URL point towards a malicious phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=wordpress+username+and+password+not+working
    • https://cdn-cms.f-static.net/uploads/4460450/normal_602ba1009e4d0.pdf
    • https://static.s123-cdn-static.com/uploads/4453344/normal_5fdf3cf7e969c.pdf
    • https://cdn-cms.f-static.net/uploads/4444114/normal_6013b05b0415b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/perurulexi/59916113081.pdf
    • https://s3.amazonaws.com/vetamedisoz/kuziwerofosiwaxulareg.pdf
    • http://ratazudawi.epizy.com/origin_of_television.pdf
    • http://fufabufitilaf.epizy.com/positive_and_negative_effects_of_globalization_in_the_philippines.pdf
    • https://89e38ec3-4f9a-4901-8333-056bfd5bbc5c.filesusr.com/ugd/3df7a3_463b577acd5f408483642cdc6e92db67.pdf?index=true
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_2569a57441964017bdff4a76477e9145.pdf?index=true
    • http://jelasojeb.rf.gd/54800750226.pdf
    • https://fea67d75-dd3b-4bdd-af05-748e92ec8a52.filesusr.com/ugd/05900a_12e5123a5390491a82aa9a84fa6ff93e.pdf?index=true
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_7766c136d6d843a1b95a501fba78762d.pdf?index=true
    • https://2c91b947-1dd8-401e-ae91-d595f2f75867.filesusr.com/ugd/0af078_41c2926caa6f4490ba298b729d9b99ee.pdf?index=true
    • https://s3.amazonaws.com/pizivurapab/hoover_windtunnel_max_uh30600_reviews.pdf
    • https://s3.amazonaws.com/vexosafugunu/ejercicios_de_lectura_de_comprension_primer_grado.pdf
    • https://s3.amazonaws.com/lebaxa/hotel_california_sheet_piano.pdf
    • https://869e45c2-9c2d-410b-ad52-4d3411d41339.filesusr.com/ugd/73bd41_1bd9b452bf984753aacbc8c3a25fd90b.pdf?index=true
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_360e3a70e984449ea1ef1e43da40faae.pdf?index=true
    • https://s3.amazonaws.com/dogazisuze/99180910058.pdf
    • https://s3.amazonaws.com/dovulavavo/pamigopezupagikike.pdf
    • http://ridaxakufogi.epizy.com/sumokamomorevibe.pdf
    • http://ronufoju.epizy.com/cannibal_holocaust_2_full_movie_free.pdf
    • https://s3.amazonaws.com/tanapilamaxi/55097399645.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd2.bin
96e96dcc992f4ad3590973b956537613ae9a123dfe271f26528a1d5ed4f570b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD2 5300 bytes
font_01_sfnt_off0000eed7.bin
c2f077d0be7863a9aca40357b746d131ffd61a50302c915ed5898956c0f99a91
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED7 10424 bytes
font_02_sfnt_off00011265.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x11265 4324 bytes