Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af88a4d0c46eec1…

MALICIOUS

PDF

68.7 KB Created: 2021-03-16 10:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d8a0be1820f0487637a86bbce53156db SHA-1: d5cb92fa8759ca7ff0cd9acc80ad3fc0e7fa3c63 SHA-256: 0af88a4d0c46eec163cf5824305a50648402c5563333aed8077e448732c0d1f6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL suggesting a lure related to 'whatsapp status video'. The presence of a 'download button' heuristic further supports a malicious download attempt. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the overall indicators point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/123?utm_term=whatsapp+status+video+assamese+free PDF link annotation
    • https://cdn.sqhk.co/rubutemoxe/akbmcia/geeni_tap_smart_wifi_light_switch_installation.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenelavup/bijMiaS/52816271147.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwuvume/NjaLmib/fishing_clash_promo_codes_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/UBhf6NL/60721893673.pdfIn PDF document text
    • https://cdn.sqhk.co/kurinunuwor/64ibrHM/mimpi_digigit_ular_putih_di_tangan_kiri.pdfIn PDF document text
    • https://cdn.sqhk.co/jonilinenuvo/ztcHhhh/ritaderodowuremusori.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/wexijaluvoxoxusapugija.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/dhjIjjq/60147256731.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/what_is_cutover_testing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xirexadugimog.atwebpages.com/95128413421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3180bf9-eccc-4b0b-990e-f97014950972/tuzowupegexesusotu.pdfIn PDF document text
    • https://38c64f87-0506-4925-a3a1-425743e24937.filesusr.com/ugd/386d45_fe9b42b9734a422d83abbc6e236248b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75392165-e05e-4519-a2c0-a9a24a78a0b4/garmin_nvi_255wt_update_kostenlos.pdfIn PDF document text
    • https://b1b1ed1d-a631-407f-b8a0-2f609481a9c2.filesusr.com/ugd/3e5895_5eea3fc89c5743aabb937802c61b0734.pdf?index=trueIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_1fe925a43c7a4128a181f9cdbf5de79a.pdf?index=trueIn PDF document text
    • http://gipebevu.atwebpages.com/satepirutov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4390fb21-6fee-47bb-b4fb-f837718f0c40/driver_genius_professional_full_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becfcfd2-5039-446a-b63c-ec66bdfbf385/what_is_geometric_formula.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_off0000cf41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF41 5320 bytes
SHA-256: 90220b3d4968c729509878f94babd523751ad669b2e46a55d4e83b508092defa
font_01_sfnt_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 10520 bytes
SHA-256: 1a9bf864f232bc6fa725beb807f39a7fc01ac21dd5f859c6b3ed1ea8605961ee

Open this report in the interactive analyzer, or submit your own file for analysis.