Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9eb5a89409f5687…

MALICIOUS

PDF

79.6 KB Created: 2021-03-14 10:48:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 05af8ebe28da5d31fd7b64d8017eec61 SHA-1: 980209bc94281c537cd88231056ecc3b984b1b70 SHA-256: e9eb5a89409f5687b8ee4a14d8a85a030f1b8e28da336991ebf32c4ea93e95f8
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 0.9992

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://jottigo.ru/strik?utm_term=how+do+you+reset+the+water+filter+on+a+whirlpool+refrigerator PDF link annotation
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/d1a13526.pdfIn PDF document text
    • https://sivanijizifi.weebly.com/uploads/1/3/4/8/134848714/xigadukixibomiwizob.pdfIn PDF document text
    • https://jofevuwob.weebly.com/uploads/1/3/4/2/134235005/2037886.pdfIn PDF document text
    • https://cdn.sqhk.co/rexazileka/Jjcge54/3203635038.pdfIn PDF document text
    • https://mijezuri.weebly.com/uploads/1/3/0/9/130969422/a6cda3878a1ae8.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/fozeko_wisisokakilob_tozukiz_vutobiwirenosax.pdfIn PDF document text
    • https://barofabilis.weebly.com/uploads/1/3/2/7/132712093/mevofotuki_guwekavolimevef.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/critical_thinking_skills_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/fmZpThi/performing_synonym_and_antonym.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/jfV5hip/gimobezegasaw.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/gonisixetekuropiwojulagir.pdfIn PDF document text
    • https://fidagavatijib.weebly.com/uploads/1/3/1/3/131398583/wuvep.pdfIn PDF document text
    • https://cdn.sqhk.co/kusasuzona/ODhfBSf/jufem.pdfIn PDF document text
    • https://dawukobisoxewi.weebly.com/uploads/1/3/4/0/134040495/ralelitamaxe-vijatikopowipaz.pdfIn PDF document text
    • https://cdn.sqhk.co/nepelusir/3L5odGX/easy_crosswords_for_kids.pdfIn PDF document text
    • http://vomamafawib.scienceontheweb.net/xenodofadax.pdfIn PDF document text
    • http://guketaz.iblogger.org/properties_of_adhesives.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luwefotikejumu.rf.gd/fazexafadatujikosugeliwo.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/bosch_logo_eps.pdfIn PDF document text
    • http://titeviwexesu.rf.gd/vanawerewixib.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/41815291894.pdfIn PDF document text
    • http://sepobifesedapeg.rf.gd/59267775944.pdfIn PDF document text
    • http://zudobuzediret.rf.gd/fipav.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_off0000f7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BC 5456 bytes
SHA-256: 48ea1a7cb26bce00da2e5421e026e43ce8d1eff313b96d2662bd5d96b4d545bc
font_01_sfnt_off00010a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A63 11052 bytes
SHA-256: 8990069e4c78cf5b4b8467d15dfc97803d5c8345ef8a00b78a5aa3995df8b344

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