Malicious PDF — malware analysis report

Static analysis result for SHA-256 7347b92bae7a79e3…

MALICIOUS

PDF

87.4 KB Created: 2021-05-06 22:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: afb5966a6649a910583cab3ffa430c9a SHA-1: 11d1fce6bc7ba7bc4d4d8e2867d5c9be59df152a SHA-256: 7347b92bae7a79e335d832e7737e63bb278f05e2948cdf9c51c1dc9f680a6ee3
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 0.9989

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://ponafet.ru/strik?utm_term=how+to+charge+sharper+image+drone PDF link annotation
    • https://ledimame.weebly.com/uploads/1/3/5/3/135306483/e4bc03.pdfIn PDF document text
    • http://jitokinut.iblogger.org/admission_war_book.pdfIn PDF document text
    • http://zaxofebejip.66ghz.com/5517167856.pdfIn PDF document text
    • http://sikewogewetonos.iblogger.org/fovogiladotorewumutawom.pdfIn PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/9882489.pdfIn PDF document text
    • http://silofabinewu.22web.org/39700162619.pdfIn PDF document text
    • http://wopoboguw.22web.org/75983776295.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/kosufedopi.pdfIn PDF document text
    • https://desalipi.weebly.com/uploads/1/3/2/6/132681317/jalodibuwowu_fosumikuvujeban.pdfIn PDF document text
    • http://nolonumufowarob.iblogger.org/anxious_for_nothing_study_guide_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2132bddb-8bf3-4722-a4e7-ba54ee2d577b/radaxaxemefolatulati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca81e50e-3e4e-4acf-8977-567bfae2ff95/81458204163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e717669-854a-4c72-995b-3b43887ba867/70020707914.pdfIn PDF document text
    • http://xeduwaro.rf.gd/nikadoraf.pdfIn PDF document text
    • http://xezeruv.epizy.com/2018_nissan_sentra_service_schedule.pdfIn PDF document text
    • http://zejelad.epizy.com/93782130640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a609def3-26e4-4739-ae13-ff8403d277ea/65352786179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf6e664-c0ec-4365-af5e-0838966020e3/74123652504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701861d3-82f8-4455-ba9f-3703018b4381/did_mary_poppins_umbrella_have_a_name.pdfIn PDF document text
    • http://tixefol.epizy.com/what_is_a_short_summary_of_the_fault_in_our_stars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150116db-330e-450c-abab-18b78585b629/delonghi_1500w_radia_s_oil_column_heater_with_timer_trrs0715e.g.pdfIn PDF document text
    • http://nibewisule.epizy.com/kidafole.pdfIn PDF document text
    • http://vugurajuv.epizy.com/95325035877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6c97d4e-598f-422a-ad8f-b805c7f063e3/how_to_use_brother_sewing_machine_lx3817.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A7 5296 bytes
SHA-256: 4ca3f9183bc2bc3eec381ba8a90f413de8917f64aabaa5413c33203d6f9e2426
font_01_sfnt_off0001188d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188D 12156 bytes
SHA-256: 81f066ba3eb30ee5ed5a1133153560ef2a776ad3ccc2a97f91ab7dd3d649de57
font_02_sfnt_off000141cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141CF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333