Malicious PDF — malware analysis report

Static analysis result for SHA-256 2958a3fcfa5b17bb…

MALICIOUS

PDF

86.0 KB Created: 2021-03-22 09:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e935ba8e971e8f3748e6a98eb1b1db49 SHA-1: b2ab20d4fca0f27ae0e0360137b951a1207aada0 SHA-256: 2958a3fcfa5b17bb052cafff8f32bd8c616e82b8bd1523f3e02f30638041ad75
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://fokemale.ru/123?utm_term=aplikasi+whatsapp+plus+anti+banned PDF link annotation
    • https://cdn.sqhk.co/nogorodizet/dWAjihO/99196370183.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/0S2dRha/16199938926.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/ggjthhC/98092537796.pdfIn PDF document text
    • https://cdn.sqhk.co/zedozomi/dzgd6gc/etrian_odyssey_v_beyond_the_myth_guide.pdfIn PDF document text
    • https://xuzomavarek.weebly.com/uploads/1/3/1/3/131383242/midimunagewaxowa.pdfIn PDF document text
    • http://tivazaluweze.iblogger.org/joxafowogadesuzatugug.pdfIn PDF document text
    • https://fereganew.weebly.com/uploads/1/3/4/1/134131887/xelezevumusix.pdfIn PDF document text
    • https://cdn.sqhk.co/livejizilul/CHjcNih/52608179301.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/igichib/gogiselopoxibaseluju.pdfIn PDF document text
    • https://cdn.sqhk.co/ninuxoti/3KTkfjf/mountain_climb_4x4_mod_apk_android_1.pdfIn PDF document text
    • https://gemumumesuligiv.weebly.com/uploads/1/3/4/3/134318519/jalesel-jewufedaxabob-xudakaxa-soxoti.pdfIn PDF document text
    • http://xuzobinemipivor.mygamesonline.org/987601149.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/hfjadgc/66193624240.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/36909836802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pekamidakoj.atwebpages.com/atlas_concorde_marvel_pro.pdfIn PDF document text
    • http://fuwubotimodiwu.epizy.com/free_short_love_poems_for_her.pdfIn PDF document text
    • http://duribolatajofa.atwebpages.com/comtrend_default_password_ar-5381u.pdfIn PDF document text
    • http://begosene.epizy.com/adblock_plus_for_firefox.pdfIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_7fd55994c8ba43c7965636aa4cdfddc7.pdf?index=trueIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_10198c845a93483b9f25044d7eb09f6d.pdf?index=trueIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_b25354f5116c46dfaafdd9a22173cfa3.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 5236 bytes
SHA-256: 6e88e3a067793cb2bd69d53329eb7b4296b208b89f04f678594c40316c414697
font_01_sfnt_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 2528 bytes
SHA-256: fa00ca2efb3740422adce526fcbaa5037a21e39b9482affa9e7d95016e3f9ad0
font_02_sfnt_off00011034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11034 10560 bytes
SHA-256: 11fbd8bb90f5db11a93b31796b5ee8c37db5641f1c3ae1020ff945cadcccb880
font_03_sfnt_off0001345d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345D 16392 bytes
SHA-256: 65be0a6854ef3d905ecb2fc4d3a5a2147560f3c5faaf050bbd171ae8e01ce8e2