Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af2ab989e0745bc…

MALICIOUS

PDF

77.0 KB Created: 2021-04-02 14:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cc8bf650566e8de6c608d50c8552571b SHA-1: bb8155dbddb3489f6be61f6605db7f0627306d9d SHA-256: 8af2ab989e0745bc7b5fcba8eee98e2fe769be62ff33dbd7c59252d487c43740
126 Risk Score

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=dell+command+update+3.+2 PDF link annotation
    • https://xofezariro.weebly.com/uploads/1/3/1/8/131871505/4430421.pdfIn PDF document text
    • http://gnoogle.site/what_does_process_optimization_mean65h4q.pdfIn PDF document text
    • http://kataeta.club/nafafimojemebegapejumof79rta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502245/normal_6008e0c45f810.pdfIn PDF document text
    • https://movamapipimopi.weebly.com/uploads/1/3/5/3/135303402/516c9be5045ead4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_603b9a557585c.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/3jjsie5/travel_bucket_list_template.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/9351929.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/81385633889.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/b9halI5/bukid.pdfIn PDF document text
    • http://xovitixekewelom.scienceontheweb.net/dejuxufat.pdfIn PDF document text
    • http://mnogolidov.xyz/11125115817kzp60.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/Vhaugg3/parallel_worlds_zelda_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/gcQ878G/nexus_gun_range_prices.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widofafane/line_graph_worksheets_grade_8.pdfIn PDF document text
    • http://vovojoj.atwebpages.com/200_gramos_de_harina_a_ml.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/jubuzixusoxob.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/balanced_scorecard_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/mcdonalds_jobs_questionnaire_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/40136109462.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_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 5272 bytes
SHA-256: c229b4c2f3fa0e18a78de88ac1aacb1a6d40e890d103a0fbbbed1c8e000c4091
font_01_sfnt_off000101b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B5 10828 bytes
SHA-256: 5a837701c676cb7b02bcdf87349e90279970f8ca23ddc7102cd34bc7841c0c88