Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea76aa5f9cb0dca…

MALICIOUS

PDF

110.8 KB Created: 2021-06-08 20:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0308cfbcc70e81125d69c0b63b5bffe3 SHA-1: b759a80d538b832d95316d24595ee211ec705c5c SHA-256: cea76aa5f9cb0dcafd54ab95d7bcca25ed0c91cbafc131ff3edd7ef7e42779df
134 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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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://pistant.ru/pbw?utm_term=sniper+3d+unlimited+coins+and+diamonds+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427509/normal_6044d3e0a9d74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497646/normal_5ff88ec55d581.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4476947/normal_60b0b95550c3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_606380382aa86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475999/normal_601d67a6464ad.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
    • https://uploads.strikinglycdn.com/files/3d1eeb1a-a3cc-4e49-b6b8-a3b2a81c304c/bupojepekegiwigisez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8f3988-681d-4150-9258-3c33e97452e4/88923577332.pdfIn PDF document text
    • http://felefejimax.pbworks.com/w/file/fetch/144581580/the_hunger_games_chapter_11_short_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e700997c-4aa4-4185-a6d6-39841a425065/tomenifexuritoseme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b07143c-b648-4994-ad64-bf7ae8a49132/2881371347.pdfIn PDF document text
    • http://pafesudive.pbworks.com/f/mujajokenolemix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40bfb1af-88c2-4afc-9255-350d27fc10ae/31539862653.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/f/how_to_find_my_saved_passwords_on_android.pdfIn PDF document text
    • http://gorixose.pbworks.com/f/can_am_brp_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10af46c8-6c30-4137-95de-9b93a89eba0d/14377646474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0c88c4-f098-4b70-8e87-468bf8977400/how_to_set_up_sodastream_spirit_one_touch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddbd9f6c-16e5-4e6f-90ab-8ab6ef68555f/how_to_reset_sonicwall_tz_205.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144641217/36935378452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbae5123-d621-458c-88a9-61817a44958a/resistance_bands_workout_chart.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/electric_circuit_analysis_question_papers_vtu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1832148-f49f-4599-ad44-bbb00baf0050/84792138966.pdfIn PDF document text
    • http://xugilip.pbworks.com/f/how_to_convert_direct_speech_into_indirect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c32a06-3bff-4b15-892b-5b536621fa0a/algebra_with_pizzazz_answer_key_page_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a193e95b-f749-4ef8-896f-bf3e048dd2cd/81254145105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eff44d1-98ea-4f3a-943e-bf963aeaaa0c/51998516855.pdfIn PDF document text
    • http://marutipug.pbworks.com/f/employee_transfer_letter_format_download.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00017f8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17F8A 19464 bytes
SHA-256: 17432c7282de637d91ac58c109d304c0b5f25e6974b330633936d483bf5ea939
font_00_sfnt_off00014096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14096 5524 bytes
SHA-256: f14fb2e57bf32c0e56c20ea67469d5fc4b3d244a8ec7e4d49ffc7d117b429797
font_01_sfnt_off00015344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15344 13292 bytes
SHA-256: fe689f9fbc6b529df8498dcdae910fc2e9b517eabfb5240685bb37c956fb5484
font_03_sfnt_off00019eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ECA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378