Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c19b3693e81f25…

MALICIOUS

PDF

91.2 KB Created: 2021-03-17 14:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6e4a74d15696743ac2697aa597d2a0f5 SHA-1: abfcd00fe1124910cddcbbbfade73a643e2c7379 SHA-256: f7c19b3693e81f255a657b9e312d544673ca94abd5e43bb64b02eec083983543
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 domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=yugioh+apk+android PDF link annotation
    • http://itawegan.fun/canadian_business_investor_s_guide_2019syvd1.pdfIn PDF document text
    • http://misstourist.info/3888807693831jdt.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/pittsburgh_steelers_schedule_2020.pdfIn PDF document text
    • http://vebuwovivulab.mygamesonline.org/boyle_s_law_practice_problems.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/bizakiberibapi.pdfIn PDF document text
    • http://badgesverified.com/peak_backup_camera_wiring_diagramr0u6k.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/pofupuvutepefinatodusa.pdfIn PDF document text
    • http://bonmarket.site/how_much_oil_for_2013_bmw_328irz61f.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/how_to_use_architects_triangular_scale.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/evenflo_symphony_dlx_ashland_grey_review.pdfIn PDF document text
    • http://rezonansmusic.com/canon_rebel_t5_specsi6174.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/rodutubekidirune.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_e2b86f726b6a4e37bf6d7ee8694086a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5eca611-6c66-4bc8-911d-4d898d111557/nagipebosepovikemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c127eb-2da3-45a5-b7a9-7e0048c78bc5/acer_aspire_e5-573g_price_in_bangladesh.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_090cf84f01114939b6b07a646346818f.pdf?index=trueIn PDF document text
    • http://mafibiw.rf.gd/agriculture_urbaine_au_maroc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6dde8dd-7131-4d0e-86bf-3d0dc39787c1/30538216212.pdfIn PDF document text
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_6349d60cc3f74499a02a34e6bb205104.pdf?index=trueIn PDF document text
    • http://tovetetuw.rf.gd/how_to_do_causal_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6a4da5-9b98-4d03-ba37-c0595ade89c6/12576933350.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_67bdfadc022e495b8b772f9b55b77a6c.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_27c37753eccb4c1aa03c49e44c7721d3.pdf?index=trueIn PDF document text
    • http://fiforeru.atwebpages.com/fakarizemakagoteserudilez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1281d57-95a3-4e63-a0d8-e57c83d24423/tovizedugavugiwu.pdfIn PDF document text
    • http://losuwanawore.epizy.com/liability_waiver_template_free.pdfIn PDF document text
    • http://duliwijedij.rf.gd/59585416729.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off00010d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 5036 bytes
SHA-256: 653c2259ae4cc7a79d3aa3ebed2c85fc8d653cdb33055f573bba99d07b72bbb2
font_02_sfnt_off00011e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E43 8280 bytes
SHA-256: 517a3b9b42b1d14fe8d28e9c9d51dc9e68e7e01bc457025fb51e1f5daa58fe92
font_03_sfnt_off00013551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13551 12240 bytes
SHA-256: 2272b2ef080b794124e4b492a6970514f644a9b684845eccfec67239f8b8e40c