Malicious PDF — malware analysis report

Static analysis result for SHA-256 269b76c3f5e77513…

MALICIOUS

PDF

77.8 KB Created: 2020-12-26 22:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ba7358c31de912cec98a839f5f29677b SHA-1: 98705f30c6fda24a5157691dc7213da946fe6dbc SHA-256: 269b76c3f5e775132c856c70758b2aaec1024f73536d40aeb0a533acfd78d210
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous external URLs, with a significant number pointing to disposable hosting services. The presence of a large number of external links suggests an attempt to redirect users to potentially harmful content or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafftec.ru/aws?utm_term=wonder+image+blur+app PDF link annotation
    • https://mosufewo.weebly.com/uploads/1/3/4/6/134685447/55587c6.pdfIn PDF document text
    • https://minizaderi.weebly.com/uploads/1/3/4/3/134344024/0108c12c4b33e.pdfIn PDF document text
    • https://bufemiwod.weebly.com/uploads/1/3/4/8/134846302/348238ff0f653c8.pdfIn PDF document text
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/8612289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_5f8fe31aea975.pdfIn PDF document text
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/sevaterog-jerok-konowevevolizer-gotukikap.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/449068e0141d5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_5fa39bca93b0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464861/normal_5fc3593861d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5fa11099373e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412195/normal_5fb73ca71df14.pdfIn PDF document text
    • https://vafevovelawa.weebly.com/uploads/1/3/1/4/131407112/920ba94214d.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/bofazevufen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xugigabitulu/see_cookies_in_chrome_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a128ef2e-398e-4489-bc67-cc1c138c733b/tepawijobolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/619ea383-9615-4a12-9c18-cc021a269055/ruger_mark_iii_22_45_grips.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 5056 bytes
SHA-256: f6d44f0dfbf125eca4db4bb648c7c1db634265bfdfd9f7f54310eb7fec72f8e9
font_01_sfnt_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 11212 bytes
SHA-256: 345ed29a979cec93a7ad337a8658b5cc1fbcee1dbc03ff42c34f6fc110fe1f0c
font_02_sfnt_off00011bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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