Malicious PDF — malware analysis report

Static analysis result for SHA-256 622f106924f3c5fe…

MALICIOUS

PDF

75.8 KB Created: 2021-03-30 10:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 326dfd5ba724f8e17731ed6740f403ff SHA-1: 8beda034cfbbac5869ff516878b7f6dd8dc1b87b SHA-256: 622f106924f3c5fe36f8e57d560c0bb3e917e9f6ed9fa88fac80a96b3b0d7d96
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://dafemum.ru/award?keyword=ebbelwei+express+fahrplan+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444377/normal_5feb30b22f300.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_603079ec18a7f.pdfIn PDF document text
    • https://cdn.sqhk.co/besiwowegin/kjgIid7/87786466448.pdfIn PDF document text
    • https://cdn.sqhk.co/tunaluvum/ighjid8/busutipigatugur.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/55308515334.pdfIn PDF document text
    • http://zagavexakagin.mypressonline.com/child_psychological_disorders.pdfIn PDF document text
    • http://toxipoxekej.medianewsonline.com/46476009910.pdfIn PDF document text
    • http://xitaboketeloba.iblogger.org/vipijibuzagekok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fitozupig.rf.gd/lagelorifoxakugozidubarov.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_3a1f20c0463c4f9b9c6fe9a6faefe680.pdf?index=trueIn PDF document text
    • http://wegugoleta.onlinewebshop.net/jodemujapar.pdfIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/how_tall_is_neil_degrasse_tyson.pdfIn PDF document text
    • http://niziziv.epizy.com/kidamiwomotuwamezonopawo.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_a8ed013343f24d4ab221eaf77c377c65.pdf?index=trueIn PDF document text
    • http://voxotili.epizy.com/mod_games_app_store_apk.pdfIn PDF document text
    • http://kofepiropi.onlinewebshop.net/44374464756.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/computer_network_architect_employment_trends.pdfIn PDF document text
    • https://7ed1f289-57d1-4e2a-9ee4-b64e0eb498cf.filesusr.com/ugd/13dc0c_944132e49945476f9d8cf59524d129ef.pdf?index=trueIn PDF document text
    • http://kanisisasulaba.rf.gd/design_of_cascade_aerator.pdfIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_e55a00e0b9124b07afb362ecf9ceda10.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BC 5384 bytes
SHA-256: 1b572d0a745ea9125cc073fd3c64c256e7d6d72ae0dfc365b60a98982d8c10f7
font_01_sfnt_off0000f717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 12604 bytes
SHA-256: 16c26b21018e1dfa7a28fb158c2d3e788531127a189237f92559dcc348134489

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