Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10d773090b7493b…

MALICIOUS

PDF

80.1 KB Created: 2021-03-12 20:25:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 099d82e086c35146d1d933b954fa9fc6 SHA-1: 8c0dbae4406ef28cfde1d9a3aa12415513cf7d5f SHA-256: a10d773090b7493bf730a80ba96f1cd02ffe9efc9ccf6032925407b28b489605
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to potentially malicious sites for phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/wix?keyword=central+pneumatic+airbrush+parts PDF link annotation
    • https://resagivet.weebly.com/uploads/1/3/1/3/131383325/sewowodadexes.pdfIn PDF document text
    • http://lovepositions.info/multivariate_analysis_cox_regression_spssklomb.pdfIn PDF document text
    • https://bidubemawekewar.weebly.com/uploads/1/3/0/8/130815124/6382803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_60153861e80b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464871/normal_5ffa24003d28a.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/9cf09d8941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_6026f59c713d6.pdfIn PDF document text
    • http://rekusigixebisuk.22web.org/dosisofizigobi.pdfIn PDF document text
    • http://okclub.org/cardinal_club_rentals_simpsonville_kysgn9j.pdfIn PDF document text
    • https://rizapomon.weebly.com/uploads/1/3/0/7/130739727/3216569.pdfIn PDF document text
    • http://copyrightnotices-form.com/vavegajola9dojr.pdfIn PDF document text
    • http://zumbayuliya.online/linux_basic_commands_tutorial_pointjpkme.pdfIn PDF document text
    • https://mibudixu.weebly.com/uploads/1/3/4/4/134490534/dadonisaxobarog_lujiwiwidut_lobero_zowebedujowup.pdfIn PDF document text
    • http://urolog.xyz/pokemon_all_episodes_in_hindi_free_download84q79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gesasodalunaka.epizy.com/bunipasipovatinegufevu.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/altec_lansing_lifejacket_3_waterproof_floating_bluetooth_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92de1706-6673-4607-a98c-0d0136a1455c/thug_kitchen_name_change.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/nalidowuderusejidikexalul.pdfIn PDF document text
    • http://nelenubo.rf.gd/bteup_scrutiny_form_2019_jobriya.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/nuzosesaxelozon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddda230-f85b-4fd0-97aa-1136505f3954/56093643687.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/pipezurodaxajurivuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd127274-b6ec-46eb-8e29-d81a5b951d66/what_is_the_purpose_of_a_sensory_neuron.pdfIn PDF document text
    • http://wexitabuvup.epizy.com/organic_chem_lab_report_sample.pdfIn PDF document text
    • http://tifimiferodovi.rf.gd/7th_grade_math_state_test_answers.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_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 5220 bytes
SHA-256: 7c84558891cd3fec79cdbe0fe8d47a3ce3a335a30ab4fa9ba335c2faaec008ae
font_01_sfnt_off00010ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE4 10912 bytes
SHA-256: b22e18149cf098ccaa20c62e46c512b920c3e2b29b7c8b01645345913c0f7ddf