Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5cc743d6c35b74…

MALICIOUS

PDF

90.1 KB Created: 2021-03-27 21:12:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2a6c32228a71232557ecee943c77a4de SHA-1: 57db2c2d87d36beffe79f28285b5b2b10dfc5a1d SHA-256: 7b5cc743d6c35b745cc69a679fb459e2e387d89e8c989fef080b36cb8e64a37e
136 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a LOLBin command-execution lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://crophysi.ru/award?keyword=debt+collector+job+description+pdf PDF link annotation
    • https://cdn.sqhk.co/zetikitor/gcMdjh0/short_rider_adventure_motorcycle.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/Uag7Xhg/folone.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/ihjarwr/jivezegif.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/YMjdhbq/55191343384.pdfIn PDF document text
    • http://fsbsiod.com/jajinobunikenekurop26g6.pdfIn PDF document text
    • https://cdn.sqhk.co/lomuwomigez/pkif4ja/ribodikonarizolixovupaz.pdfIn PDF document text
    • http://profyhouse.ru/the_endless_summer_1966ssqk5.pdfIn PDF document text
    • http://infonewsuk.site/how_to_make_an_android_app_without_coding_knowledge7ctci.pdfIn PDF document text
    • https://uploadsIn macro / runtime command snippet
    • 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
    • https://s3.amazonaws.com/mikibetiv/95472269867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb9255e-0914-4251-96d2-6e22e5b62908/35847868078.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/6974187655.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/287b4e42-8f7e-4698-97e6-16a8d5f1f2f0/56936423336.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06621ab6-53d1-4f07-885e-6d26439f8b36/putuvisexanagatagofekodil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93bd052d-ae8b-432b-b17f-b04256c0c924/maze_runner_2_full_movie_dual_audio_download_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/suunto_ambit_restart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0783a489-1c96-43cb-bfb8-4e8217f8163e/xilet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240dc87d-7235-49d7-8ef5-615966238232/strongs_concordance_number_214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff0698d-d798-4db8-9947-19b7c7db994e/70120075902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c316e77-b941-43e6-bd2a-ad0155af0938/15128757893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ef3488-5b74-4b72-8609-6bee1bb3b08b/line_6_pod_pro_sounds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd747d40-e930-483b-a734-84bef8bb88b2/tascam_dr-60d_mkii_timecode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ab7e56d-cac5-49a5-977d-47cb4bc1cb5c/uglys_electrical_reference_2020_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/58602377587.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/leshen_mhw_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7fd1ef-570e-4043-81e5-65778931afc4/gisakubukegobejidamesasa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001151b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151B 4940 bytes
SHA-256: ffd4376eb0963a5ab1a5aaddde49eea3d6412a592a9f02ad00f301449bdda78b
font_01_sfnt_off000125ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125ED 11436 bytes
SHA-256: 673616f0062b70fadab37e97f2180725006328be8e6ce35604ce60c1c4ecfaf2
font_02_sfnt_off00014cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361