Malicious PDF — malware analysis report

Static analysis result for SHA-256 c627e580fa4fd01e…

MALICIOUS

PDF

94.2 KB Created: 2021-03-18 23:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5f89b9bb9c5957f3d3b7a36093a33b0 SHA-1: 90791b9fe85130422f000077513d92eb7ede39b3 SHA-256: c627e580fa4fd01ebdb06c4eb70c4f486ab03a393fb60a5c69c75d0e91915a5d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which are suspicious and lead to unknown or potentially malicious domains. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a book title, likely intended to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=the+craft+of+intelligence+en+espa%25C3%25B1ol+pdf
    • http://pmaider.com/844379490894aeax.pdf
    • https://cdn.sqhk.co/luwiwaduna/Th65Xie/planet_of_the_apes_caesar_son.pdf
    • https://cdn.sqhk.co/vokipidelad/W27igdt/airport_utility_app_for_android_free.pdf
    • http://gratoraama.space/jegagec2qck.pdf
    • http://xiruzox.mygamesonline.org/chegg_textbook_solutions.pdf
    • https://cdn.sqhk.co/xuluriwu/LhdUZG8/77216446976.pdf
    • http://joteruraxa.22web.org/graco_milestone_car_seat_cup_holder_replacement.pdf
    • http://wuroguredogir.getenjoyment.net/vizofupifoki.pdf
    • http://stepka2016.xyz/30043976550lu3p8.pdf
    • http://netzamka.ru/princess_coloring_pages470x5.pdf
    • https://cdn.sqhk.co/vupapevixu/fjjgigf/ronemejepuwarawesisegej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/61758689-92f0-40e5-9a22-69945317a5c0/heart_of_darkness_movie_netflix.pdf
    • https://s3.amazonaws.com/dewazewokib/lomokonububuzado.pdf
    • https://s3.amazonaws.com/jonora/visejudifusatimuze.pdf
    • https://uploads.strikinglycdn.com/files/9775753e-028b-45a7-8138-514836e31af6/canon_pixma_mx300_scanner_driver_download.pdf
    • https://uploads.strikinglycdn.com/files/1ecdf349-40b1-4349-a8e4-6a4b2674ebe8/how_to_learn_ms_access_2007_step_by_step.pdf
    • https://uploads.strikinglycdn.com/files/d650416d-9367-4cab-ab00-811d6840a42b/technivorm_moccamaster_instruction_manual.pdf
    • https://s3.amazonaws.com/murudute/99186475414.pdf
    • https://s3.amazonaws.com/gavobawum/vegetarian_recipes_for_kids.pdf
    • https://uploads.strikinglycdn.com/files/abb226d4-37be-42e6-9398-c8e8de129e61/bafugerurufakakoxomudi.pdf
    • http://supumigo.epizy.com/wabivikoxuwabetuselupe.pdf
    • https://s3.amazonaws.com/moduluzuxikari/16943165047.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f25.bin
7d1c3e0c2018f83854d66a83938703b9fa521aa72d60bb1f94675e31203b118d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F25 5576 bytes
font_01_sfnt_off000141d3.bin
18073f8936dea605044147b60aaa8cc29d60c3cccfa69e9098dfa165180f312e
pdf-font-stream PDF embedded font (sfnt) at offset 0x141D3 11800 bytes