Malicious PDF — malware analysis report

Static analysis result for SHA-256 6782ac3355cb1a18…

MALICIOUS

PDF

77.1 KB Created: 2021-03-07 22:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: f8fb47f454436f0fadc79355263f2ce1 SHA-1: 6df0ef1a44ad91c733fc1633aa3cf87a33bc3c87 SHA-256: 6782ac3355cb1a183ca1213ef3e79f92bfce0bcf3d0297723d0da817ce1108f3
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, embedding numerous URLs, with a primary focus on https://botokaw.ru/wix?keyword=alden+iowa+zip+code. The document body, though heavily obfuscated, contains metadata related to PDF creation and potentially search engine optimization keywords, reinforcing the link farm and phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/wix?keyword=alden+iowa+zip+code PDF link annotation
    • https://laxopewivizi.weebly.com/uploads/1/3/5/3/135394850/8586802.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421210/normal_6000346087e59.pdfIn PDF document text
    • https://fugebigejajifad.weebly.com/uploads/1/3/1/4/131406613/e8453d3e.pdfIn PDF document text
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/1201097.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/yAJhjvO/mepuwonixaf.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/a1idha9/youtube_to_mp3_iphone_app_offline.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497093/normal_6003583a7844a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376120/normal_5fe11a0f8d735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481170/normal_5fe69c66ab9fa.pdfIn PDF document text
    • https://silukirajewulo.weebly.com/uploads/1/3/2/6/132695932/bcd078d0c261.pdfIn PDF document text
    • https://lekamenofujilap.weebly.com/uploads/1/3/4/6/134690267/xajovetopazudu_rikosisavagus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421062/normal_6019d54f5ae89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf507ced-1c31-4d4f-9b1f-37107a31ce5a/chaos_theory_equation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225223a3-27bd-46e4-9e18-5e73d58b4be4/romeo_julieta_cigars_mini.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/luvamobinafaxanome.pdfIn PDF document text
    • http://xetoluwe.epizy.com/chevrolet_orlando_2012_owners_manual.pdfIn PDF document text
    • http://dogefifuga.rf.gd/65424781748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1755d8b9-7a1e-4c00-b3d9-dedb5642d2f7/54451003314.pdfIn PDF document text
    • http://pijiwir.rf.gd/muwijosajapaxufesatu.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/mogajiweriditoz.pdfIn PDF document text
    • http://mevexunimapo.epizy.com/craven_edge_weapon_sheet.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_off0000f2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C7 4924 bytes
SHA-256: 40efaf82e1d3bce165be6a4f2570251606260ea8591430b49a68f1da25a001eb
font_01_sfnt_off000103b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B8 10428 bytes
SHA-256: ab9faefd96d541aa246e13efca16b84c01335f21091906197cc7a6a5eb8adb59

Open this report in the interactive analyzer, or submit your own file for analysis.