Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ce5ddd5bd2cedd…

MALICIOUS

PDF

91.6 KB Created: 2021-03-28 14:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 87b6fb7be2f2cf2ea72080c0abe1990e SHA-1: b7cb027ee0023844b3b3634f6c660dfb3edb063e SHA-256: d2ce5ddd5bd2cedd2cb3f8efded0b3a549d984cfaf9b0e1722a6ad8c635db6f0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware delivery mechanism, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=anxious+for+nothing+john+macarthur+pdf PDF link annotation
    • http://znohist.site/acrylic_sheet_for_laser_cutterf985h.pdfIn PDF document text
    • http://nncucuucuc.space/psychometric_aptitude_test_questions_and_answers6ygpz.pdfIn PDF document text
    • http://prolac.ru/74174252951f70rh.pdfIn PDF document text
    • https://memelixuluxowi.weebly.com/uploads/1/3/5/9/135958522/2548872.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/59434916719.pdfIn PDF document text
    • http://stal-kemerovo.ru/83316292915m77xy.pdfIn PDF document text
    • http://japadalifu.22web.org/21148625272.pdfIn PDF document text
    • http://manidat.sportsontheweb.net/arrl_antenna_book_19th_edition.pdfIn PDF document text
    • https://fazukowabawubi.weebly.com/uploads/1/3/1/4/131407802/aab1f7b26d3f.pdfIn PDF document text
    • http://closemaze.com/how_to_use_a_schwinn_hand_bike_pumpwewww.pdfIn PDF document text
    • https://nowagomasililub.weebly.com/uploads/1/3/0/7/130775830/jupuvu.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/what_is_the_lord_of_the_rings_about_quick_summary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zewudopufe.epizy.com/how_to_change_input_on_hitachi_tv_without_remote.pdfIn PDF document text
    • http://pewubik.atwebpages.com/paul_de_senneville_mariage_d_amour_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f697e02-f657-4c46-8ad0-65a4bd77093b/mistborn_trilogy_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25822fb-4ece-4ac5-bfd3-e7b454bc0fa6/neca_manual_of_labor_units_2017.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/38426535486.pdfIn PDF document text
    • http://lejovoxi.epizy.com/strength_training_anatomy_workout_ii_download.pdfIn PDF document text
    • http://kutadomirezo.rf.gd/realidades_2_capitulo_1b_answers_page_29.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c93190-22b9-41f4-a975-4c32c68c1f07/spring_framework_tutorial_github.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12518 5672 bytes
SHA-256: f165435f9dd0edfae852f8e7505d0291c8b0d8230e172140f6fc755fd1c591b2
font_01_sfnt_off0001384c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384C 11920 bytes
SHA-256: e6a2ccaabcbf90aaf21513aea2328e800d2ce3e0b16d3644f5ab64fb338245be

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