Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9cb0f6d06d91845…

MALICIOUS

PDF

160.8 KB Created: 2021-03-03 00:07:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 51bd6bad85340496b21f049caf43f49e SHA-1: 70d1f8e0c93c29346bbf3006ee0402d6b097f112 SHA-256: e9cb0f6d06d918450dffbcb8132e54417db276967faef309d42055dda369f970
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'black friday deals', suggesting a lure. The presence of multiple disposable hosting domains and link farms further indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=bissell+crosswave+pet+pro+plus+black+friday+deals In PDF document text
    • http://rinujajija.getenjoyment.net/kulumelisuwatekurikuxupi.pdfIn PDF document text
    • http://javaxirivibewi.mygamesonline.org/pixegamof.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/how_to_change_battery_on_jbl_flip_3.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/ib4QaTw/my_att_directv_bill.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469349/normal_5fe0ae0e6eecf.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/30211080270.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/torin_black_jack_3_ton_manual.pdfIn PDF document text
    • http://garobunatuxovi.scienceontheweb.net/44537663888.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/71942180202.pdfIn PDF document text
    • http://ribavid.medianewsonline.com/is_the_great_debaters_a_true_story.pdfIn PDF document text
    • http://www.opentle.orgIn 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
    • http://xomapagovujux.atwebpages.com/how_to_build_your_own_vocabulary.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/how_to_connect_i_pilot_remote.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/formato_para_minuta_de_acuerdos.pdfIn PDF document text
    • http://pudolajuji.atwebpages.com/katojibuwinalegofol.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/us_history_quiz_13.pdfIn PDF document text
    • http://bamuragaxo.epizy.com/skyrim_se_best_mod_load_order.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://www.gnu.org/licenses/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001b0cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B0CD 11944 bytes
SHA-256: d81d712f59d606d2214cea7d60e97b77c9441464a37823d9e7a22c3433f4b1bd
stream_007_off00021e83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x21E83 33008 bytes
SHA-256: a29fb9c1a464e0c54fc04967170048683dca095e8639eb0a6154dd85e56783cd
font_00_sfnt_off00014836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14836 26724 bytes
SHA-256: 224291a49d57eb8806624dee98cffdbeecf193436047cc3bbd4ec91a6eebd290
font_01_sfnt_off00019d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D67 5656 bytes
SHA-256: d24f4999fe9b6cd6d4f7b5ee3d2c8898d6dbbac43f1613d7381e75aba4360153
font_03_sfnt_off0001d2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2B2 28540 bytes
SHA-256: dccee7650923a9e2dcd7156370afb4d07d222f955ee007fb61bdec04b755199b
font_05_sfnt_off00025707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25707 8104 bytes
SHA-256: 1ea5e5d17994a4dba5f41a56a12831af12d661dcc4c6b3fbe35496adc576c503