Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad86fea8babe4180…

MALICIOUS

PDF

71.7 KB Created: 2021-03-11 08:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 714b9e3de54db08adc6040c9ac785108 SHA-1: e422cbcda24e28206cd040cefbcece7f7aa996fc SHA-256: ad86fea8babe41802bde522e33a287732aea7282947a5bf9053ea4524fdb7484
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 0.9996

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://druttle.ru/award?keyword=tactics+for+listening+advanced+pdf PDF link annotation
    • http://bestsaleshopin.xyz/effectiveness_of_retailing_mix_in_big_bazaarjhf4b.pdfIn PDF document text
    • http://ritual-venki.online/business_continuity_plan_template_for_financial_servicesy19lo.pdfIn PDF document text
    • http://wijofotezopadik.medianewsonline.com/laptop_hp_probook_6540b_specs.pdfIn PDF document text
    • http://evilcheats.fun/29779851773ywgwx.pdfIn PDF document text
    • http://sitakog.iblogger.org/iconoclasts_trophy_guide.pdfIn PDF document text
    • http://monanuzusud.22web.org/70370517974.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuputes.atwebpages.com/74957369609.pdfIn PDF document text
    • http://dabirojab.rf.gd/adobe_photoshop_cs5_portable_free_softonic.pdfIn PDF document text
    • http://xujariju.epizy.com/kibijatusamunebadede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0168b54c-73b1-47ea-92a5-9be72781359c/how_to_prep_for_sat_math_2.pdfIn PDF document text
    • http://bobakazof.epizy.com/42957003531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168d2471-75c0-406f-8adc-8aa90c61980c/hp_laserjet_pro_400_m401n_airprint_setup.pdfIn PDF document text
    • http://zerimokima.rf.gd/71249700349.pdfIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_48ce9375a2754a249053ce0f1d013f56.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_dc608d8d40164a3bac8fc4e12ee91bc7.pdf?index=trueIn PDF document text
    • http://rinonefor.rf.gd/lenovo_t420_laptop_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdeb62f5-575e-4a84-bca7-b7467c0d30d4/which_twilight_movie_comes_after_new_moon.pdfIn PDF document text
    • http://kuxemozoxabonag.onlinewebshop.net/el_clasicismo_griego.pdfIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_8df567915a654a5ba2a07c866786d934.pdf?index=trueIn PDF document text
    • http://kawalagijefoj.rf.gd/vazawutosaxaroloned.pdfIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_2d9745c768864182a22afd348fff9e4c.pdf?index=trueIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_69395ac316b54910bb9574d71f0f99da.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_off0000db10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 5332 bytes
SHA-256: e07115ec1fbd87aded1a6dc58da7c4f9cdaa5218f5e546e8a602b32b963161e3
font_01_sfnt_off0000ed45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 10676 bytes
SHA-256: 49c85258e2cd18415b69b799b0f4fc443282b2b972821cfc91ed7a2c30751ce2

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