Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec29f8de4dd6aff3…

MALICIOUS

PDF

73.5 KB Created: 2021-03-09 01:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 454d258587ea03490ee4456b9e76bafd SHA-1: b6b9863c45e7cf9332b3410ea5bae7d66aba566e SHA-256: ec29f8de4dd6aff391ec4c7645273087f85c4c654f7eb8302f045acf82bea022
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/wix?keyword=papa%2527s+pancakeria+primary+games PDF link annotation
    • http://kafalogu.22web.org/ap_seminar_irr_examples_2020.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/1247497.pdfIn PDF document text
    • https://sakobapo.weebly.com/uploads/1/3/3/9/133999770/9ddb027.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/djjjbHS/classing_up_the_joint.pdfIn PDF document text
    • http://dutuvowori.22web.org/barbie_doll_ki_pic.pdfIn PDF document text
    • http://nikecortez.net/tijekipocey7.pdfIn PDF document text
    • https://xoregofejaba.weebly.com/uploads/1/3/4/6/134651656/8951465.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/aggihiI/tavaxevakeposodozunisi.pdfIn PDF document text
    • https://zekupepub.weebly.com/uploads/1/3/5/9/135992873/fatizilaxusiluzome.pdfIn PDF document text
    • https://fafenerukore.weebly.com/uploads/1/3/1/3/131398145/5e730e1e67776ff.pdfIn PDF document text
    • http://proba7.xyz/percy_jackson_the_lightning_thief_book_plotybr9r.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/lupepazurig-fanavig-tunawu.pdfIn PDF document text
    • http://polystate.ru/how_to_reset_my_nighthawk_ac190099m6j.pdfIn PDF document text
    • http://mushygushysayings.com/76465736025e47pc.pdfIn PDF document text
    • https://nibevomixosu.weebly.com/uploads/1/3/4/1/134108547/a94a53614a.pdfIn PDF document text
    • http://qqkaxes.xyz/synopsis_of_the_little_prince_by_antoine_de_saint_exuperyvb3v4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/pazese.pdfIn PDF document text
    • http://nowakimelufumi.epizy.com/tutaxoze.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/4124228543.pdfIn PDF document text
    • http://nuxijezusuwep.rf.gd/employment_forms_of_id.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/elementos_radiactivos_de_la_tabla_periodica_y_sus_aplicaciones.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_off0000e24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24D 5424 bytes
SHA-256: 0cd69ad74b0906559cd681ff08ab0a046824b5556e36146d4e52aa552d18ebe5
font_01_sfnt_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 10540 bytes
SHA-256: 9baf6725882f5077511cac1b6d00b23e437919e6c2e03e89a844c28ef3aa4508

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