Malicious PDF — malware analysis report

Static analysis result for SHA-256 0812d9288f1aa1a4…

MALICIOUS

PDF

70.1 KB Created: 2021-05-29 12:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 42363632f7029866e914919977ad9e93 SHA-1: 22f8c0dcf025c89f69c5e03d67597bd6e77743ac SHA-256: 0812d9288f1aa1a4589683aef7891e57602e695b5aa0e931179fe561a77c4134
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a suspicious domain that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically classifying it as a phishing trojan. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of embedded URLs points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=bhatti+vikramarka+telugu+full+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481527/normal_601676fe64a9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481053/normal_606aae3d37668.pdfIn PDF document text
    • https://kinixudowobi.weebly.com/uploads/1/3/5/3/135399761/dd9c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_604da6b369209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382638/normal_5ff65f9318df8.pdfIn PDF document text
    • https://medirabo.weebly.com/uploads/1/3/4/0/134040550/304629373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414342/normal_5ff31eea45922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365563/normal_5ffe295412c03.pdfIn PDF document text
    • https://magazeja.weebly.com/uploads/1/3/5/9/135990405/sozelof-soxajotonojari-zisobinumupikor-tiwetuwedumixas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5ffa119cf320b.pdfIn PDF document text
    • https://fixaporaxaju.weebly.com/uploads/1/3/1/4/131413905/fapamevowuga_wekaseraxag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465024/normal_5ff93502bc26f.pdfIn PDF document text
    • https://nusewumu.weebly.com/uploads/1/3/2/7/132740482/jimili.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/2480d68c-b036-4b61-8135-07fa70f0f483/panasonic_plasma_tv_42_inch_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3d7c17-e757-4910-add9-d524cfe99051/wendys_calories_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded9c7c3-45b7-480d-b3c4-267e79a626eb/32839279166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01124dc5-ea2c-4446-bad1-3888f8261c20/larousse_diccionario_avanzado_de_espaol_apk_full.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_off0000cfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB2 5176 bytes
SHA-256: a2fca82ba67ae25a2763419643ae13c5449303e30283b14989f556da0f504a87
font_01_sfnt_off0000e132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE132 12644 bytes
SHA-256: 5ec69fcfd543160d95bd965912d92b537f81898ef79f3e64e9515cf627066dc5

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