Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c4047d99d00143…

MALICIOUS

PDF

87.3 KB Created: 2021-02-15 10:32:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: cee367087bafe5e173964efd0f93b87c SHA-1: ee6201ff0c5688d4f8de65c83dd9010a06dc64e2 SHA-256: 73c4047d99d0014311add2885eec458f5c64c1c0e7cdd25fc29641411d370e6d
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and Weebly/epizy hosting, indicating a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=swtor+healer+guide PDF link annotation
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/2702558.pdfIn PDF document text
    • https://cdn.sqhk.co/tolebilu/Fhdelif/zufuxutisujowu.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/UQQvNNK/builder_for_minecraft_pe_free_uptodown.pdfIn PDF document text
    • https://dovasivenumi.weebly.com/uploads/1/3/5/9/135965427/wegarotogug.pdfIn PDF document text
    • http://xorelurisadadun.iblogger.org/number_spelling_1-_100.pdfIn PDF document text
    • https://raxopukefafifi.weebly.com/uploads/1/3/2/6/132695755/5976500.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/jjrI79P/75717802676.pdfIn PDF document text
    • https://vogoniboka.weebly.com/uploads/1/3/1/0/131070279/4437157.pdfIn PDF document text
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/2252531.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/iiihjo4/46440434307.pdfIn PDF document text
    • http://nibumuxadata.66ghz.com/ms_sql_test_database.pdfIn PDF document text
    • https://foxewazijibaj.weebly.com/uploads/1/3/1/3/131379544/mofakuxunagiz_duferuliso.pdfIn PDF document text
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/dedokolene.pdfIn PDF document text
    • https://kibibobufusasi.weebly.com/uploads/1/3/4/6/134643218/5879045.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xegiseko.epizy.com/47817171816.pdfIn PDF document text
    • http://jigigapapidafe.epizy.com/89854642911.pdfIn PDF document text
    • http://tasetexogop.epizy.com/dirole.pdfIn PDF document text
    • http://zatunikepozis.epizy.com/96485206610.pdfIn PDF document text
    • http://divojeniro.epizy.com/gatoji.pdfIn PDF document text
    • http://vowaxuf.rf.gd/cbs_sports_injury_report_nba.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_off0001188d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188D 5104 bytes
SHA-256: 07ee411cd0cb8796dcd72b9da01f7e6ba935cce852cb4d8fa199bcbbfeb1577a
font_01_sfnt_off000129ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EF 11316 bytes
SHA-256: 36a8d4d498fd1d01b994af00d6eda0c8342b1f221efa3f54c53a48a1c5880383

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