Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6534a4e72fd2c6…

MALICIOUS

PDF

78.8 KB Created: 2021-03-13 21:34:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b27c51a9612dab29c8914c1d045fc643 SHA-1: 256b42107259ab71ab9b89ce07e36e256c6d0977 SHA-256: dc6534a4e72fd2c6a63bdbf550d94510a71329c40c91bf6aefba617ea9cb782e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to host phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/123?utm_term=excalibur+dehydrator+sheets+canada
    • https://cdn-cms.f-static.net/uploads/4464709/normal_60355015ad1bd.pdf
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/3e4f04ce4f.pdf
    • https://gibonubud.weebly.com/uploads/1/3/4/8/134877094/jegolojiluzi.pdf
    • https://jegivobepumo.weebly.com/uploads/1/3/4/4/134444156/dedazagedoni.pdf
    • https://cdn-cms.f-static.net/uploads/4478134/normal_60373e3d9e4cb.pdf
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/2047029.pdf
    • https://ganipomadajo.weebly.com/uploads/1/3/2/6/132695424/713fc0da.pdf
    • https://rorupuloloxotog.weebly.com/uploads/1/3/1/4/131409755/vikedo-dokir.pdf
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/48036.pdf
    • https://cdn-cms.f-static.net/uploads/4411498/normal_5fda546d2747d.pdf
    • https://cdn-cms.f-static.net/uploads/4386330/normal_60183b386c694.pdf
    • https://gafexevuwemab.weebly.com/uploads/1/3/6/0/136091136/zelalixu.pdf
    • http://vemexulitoko.iblogger.org/alcools_apollinaire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_6306a6961a394ff09cb9d2a2cd16ca36.pdf?index=true
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_1aa84c36d28044d58ebe9033b69e90fe.pdf?index=true
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_f9344cfde40a494ba966cb82cd0e243e.pdf?index=true
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_ede7a848c1cc4e99af034939af77eb93.pdf?index=true
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_e52288bba4b24a3dabc1fd2d6e65cdc1.pdf?index=true
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_f342bef49a634efc8ba9768f455e1c7b.pdf?index=true
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_827bfab4d5d44b0faa2f046ca0db96d2.pdf?index=true
    • http://xonifovozub.epizy.com/bemula.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f738.bin
2145d561f41c0426743285dd3d10447cf68f034029a1fa57e7f14fc9427f785b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 5296 bytes
font_01_sfnt_off00010935.bin
144830cfab17ac65a09560548abaf576dbea70fb768254f351e055beb8c70f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 10720 bytes

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