Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54b8887570e92bd…

MALICIOUS

PDF

198.4 KB Created: 2021-04-11 20:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d612f4ba8cace64d8cae7b42776f667a SHA-1: 0ecc37ed21bfb9601e2a563ba0cb5365f7ce2b45 SHA-256: d54b8887570e92bd08a781077e9585f5a03ba2814674b1dd0d8439d7305cd8e6
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or phishing content. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to a malicious site. No scripts were extracted, but the PDF structure itself facilitated the inclusion of the malicious URI.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9683

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=the+holy+science+audiobook PDF link annotation
    • http://wapividazofar.scienceontheweb.net/1353291934.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/dinosaur_yoga_cards_free_printables.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/UZWgs6Q/golden_boot_race_2019_20_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_60613eafcaa0f.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/LZ7ghBw/hidden_ball_trick_mlb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454990/normal_60090d88d7ef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484169/normal_603e3a822700c.pdfIn PDF document text
    • https://cdn.sqhk.co/lepemafe/fH3hbbj/tigoxutilezizirapanu.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/l_adjectif_qualificatif_pithte_exercices.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452154/normal_5ff291d43a542.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/jijbhax/bubilarikelezudoritasu.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/burial_rites_download_free.pdfIn PDF document text
    • http://toluvubub.mygamesonline.org/47847649734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_60468a6b30a2e.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/ReljjsI/android_studio_button_border_color.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a4ca5f-ad29-4c74-95f9-288cf6efa7ef/54543548619.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d983c350-cd4e-4cda-84df-9764e577acde/kamixagegibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4bdd137-2ab9-4094-9bbf-da74537b7cfc/in_the_heights_cast_recording.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/550fc21b-9379-484f-a2c2-36a394e7173f/nopudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3a52e6-35ee-4676-a66c-185224a72515/what_on_netflix_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d7dcc9-b4a0-4fd3-9a91-134d75ef3b7b/sda_church_directory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b80e8b-8fb0-484e-b2b8-1c38c7e11941/cinderella_book_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277f151d-689a-4351-b26f-d334389d8cf4/what_is_the_meaning_of_web_services.pdfIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_57dbb51a56864f978473fff10d10c625.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/870e1ef0-28d4-401e-8981-00285ee3d0ec/oster_blender_pro_1200_with_glass_jar_24-ounce_smoothie_cup.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_6d86a4bdd56d49be964f482f1520a199.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_00a813d9f03546c1bc4b8356454787e2.pdf?index=trueIn 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_off0002c1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1D4 5184 bytes
SHA-256: 8ea820cca48a468cc37e9b036435963cfd76dd86af22714ed848f4cf2113662c
font_01_sfnt_off0002d37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D37B 11040 bytes
SHA-256: 310f6f9d6c16d7901e4fac85ab7c270b20e603b4816688ca873fac655cd8ced5
font_02_sfnt_off0002f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F936 4608 bytes
SHA-256: a6a8ab4f64a531a7b4dbe7d02b273a85ea277a81420d198cb6c27238e31455d8