Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21745b4cd27cd4c…

MALICIOUS

PDF

89.0 KB Created: 2021-04-06 15:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 40e0d9b43f2c73788cd5fce12b4b1d7d SHA-1: f06bc4746483f61f594ec312184d9e7513201de8 SHA-256: d21745b4cd27cd4c070832933da26fbb36d61946f643396ba62836e6638980fe
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with at least one pointing to a domain associated with award notifications, suggesting a phishing or scam lure. The presence of external URIs and link farm heuristics further supports this. No scripts were extracted, but the overall structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/award?keyword=alif+baa+taa+pdf PDF link annotation
    • https://cdn.sqhk.co/fedovipawe/ic0jjBb/wapazirisajitusono.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/6jh1Igj/47628113657.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/eighfjd/new_american_standard_bible_audio_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vabilafibalu/ShOy4dI/hidden_objects_games_online_247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421224/normal_605ffcf98dc03.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/lean_warehouse_management.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/nYUykje/distance_measuring_laser_instrument.pdfIn PDF document text
    • https://cdn.sqhk.co/xutujipux/jhghEhi/lexowulosomelazijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_6039e94af248f.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/jgiicvj/10010936661.pdfIn PDF document text
    • https://cdn.sqhk.co/saxezekobida/3he3LnH/adderall_xr_coupon_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/ggy76ha/haitian_kompa_radio_stations.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desujolu.epizy.com/benoit_badiashile_scout_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e6e843-14a5-4cc5-83aa-adc862629e11/personal_pronoun_worksheets_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/189bfff2-17fc-480c-87e5-a290861125b3/saeco_talea_giro_espresso_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11869386-505c-4ac0-adf4-1488ca697520/pixosokewesusomebijufaro.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/how_to_install_xfinity_cable_box_to_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407a0405-5a13-4243-bec5-9d150f57afb9/52763796306.pdfIn PDF document text
    • http://xefiposokupama.myartsonline.com/5._snf_blme_ilemi_problemleri.pdfIn PDF document text
    • http://gejebegujisutil.rf.gd/9001768559.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/vetopokaxaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dcfcd75-61b8-4fe6-bf7d-81acdba9b6b9/samsung_printer_xpress_m2825dw_troubleshooting.pdfIn PDF document text
    • http://metologedafux.epizy.com/kimonukata.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10270 4892 bytes
SHA-256: eba4e1ec2da6dc35013ea6c9493075b4a349c18274e1a5085fb503f31a6bd248
font_01_sfnt_off00011329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11329 11244 bytes
SHA-256: 65e20ab03e566437e9c23f6068465efa252ba71c8f4d22c32d0004b9d1b8ab3a
font_02_sfnt_off0001399d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399D 18528 bytes
SHA-256: db3e6d4e2224e5a9542ec651e245207a57df215403e32f6f2e4e8dfc1e95aea3