Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d19c3cc973a6bc…

MALICIOUS

PDF

82.0 KB Created: 2021-03-18 21:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: aa39ad3ff2b2ddf5455d95569c306988 SHA-1: 6dc8add8b492be519959208b58c8b9f7ef135e04 SHA-256: 72d19c3cc973a6bc941f7b895482f3c3708403cd6d2b93fdd88519d07aaaa74d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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://xajibur.ru/award?keyword=agrianual+2020+pdf PDF link annotation
    • http://ecoterritory.store/what_is_show_interface_switchport_commandxf1be.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/51931974142.pdfIn PDF document text
    • http://copyrightram.net/free_online_games_for_kids_no_download_robloxw1gt6.pdfIn PDF document text
    • http://fodamibokaf.66ghz.com/20083070166.pdfIn PDF document text
    • https://cdn.sqhk.co/tegiriwepaj/hggcQia/41932376331.pdfIn PDF document text
    • http://esplus.pro/311261994675oj91.pdfIn PDF document text
    • https://zosafetudosejo.weebly.com/uploads/1/3/4/6/134670517/tomoxixasezevoli.pdfIn PDF document text
    • http://reduslimitalia.site/a_discovery_of_witches_season_2_episode_1_summaryq6i8c.pdfIn PDF document text
    • https://medofigovur.weebly.com/uploads/1/3/5/3/135316586/tanekujolumusubiw.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/W4gggh7/busijivizexupexur.pdfIn PDF document text
    • https://suxekupawuva.weebly.com/uploads/1/3/2/7/132710704/8b55de65.pdfIn PDF document text
    • http://cheapkeys.site/wahl_beard_trimmer_battery_operatedv3h0p.pdfIn PDF document text
    • https://monezoxikaxusoj.weebly.com/uploads/1/3/1/4/131453753/12ee0e239ce.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/idih8hi/40669969066.pdfIn PDF document text
    • https://kodugeji.weebly.com/uploads/1/3/6/0/136089350/kewomunusijal.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
    • http://wawefib.rf.gd/62783675800.pdfIn PDF document text
    • http://fedasumenusum.rf.gd/gasazozoxukavobaxepo.pdfIn PDF document text
    • http://sogefotatuledis.epizy.com/capture_the_flag_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2adc6756-2777-46b8-84f7-e6df9cff3f06/allen_bradley_plc_programming_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f6e7ef-f2fe-4eb3-b57e-fee73109574c/56801687838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad9c1b9-09df-44bc-85a4-7d1d09774c68/benunuvizazorebadelonivow.pdfIn PDF document text
    • http://xifeloj.onlinewebshop.net/40089963569.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC2 4868 bytes
SHA-256: 76d4a47b9b0d52868c4cebff9ab280f4c7eb6e34fc1f6217b90ae6f6e138a4a9
font_01_sfnt_off0000ed49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED49 12892 bytes
SHA-256: 1d28fd6a87ef0edaea53f5818b8a43adfe27e604f209476756ff8a1a41203dff
font_02_sfnt_off0001154b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154B 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off00012a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c