Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8ebf432b8d71d3…

MALICIOUS

PDF

94.7 KB Created: 2021-04-15 14:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7fd7db1c500328c7e4135fe93a203a1b SHA-1: 21d06129b355f18d4ed219abb21ed8d86b3d43bc SHA-256: bf8ebf432b8d71d35d3b99aa275933d891b13465bc1991db0f4c79e58f405c8e
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection for phishing and trojan activity. The embedded URL and document body suggest a lure related to passport updates, directing users to a suspicious domain. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://dugedepap.ru/strik?utm_term=how+to+update+passport+9500ix PDF link annotation
    • http://eushopvmn.site/56763048998psurt.pdfIn PDF document text
    • http://1green.space/aptoide_apk_download_minecraft6yro1.pdfIn PDF document text
    • http://denizan.com/raze_3_hacked0b68h.pdfIn PDF document text
    • http://christinaanddavid2019.com/ledisekitogatugosimezsnqtq.pdfIn PDF document text
    • http://xumegexujarev.22web.org/better_off_single_parents_guide.pdfIn PDF document text
    • http://vijufik.iblogger.org/64732303986.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/25e4d2ac-9bad-46f2-b948-6afe0a701a99/1307576058.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_4882195b67d64d0f88eeff7ec269566b.pdf?index=trueIn PDF document text
    • http://kenovog.rf.gd/tabla_de_verbos_regulares_e_irregulares_en_ingles_y_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/44375347577.pdfIn PDF document text
    • https://11e0ccb5-01dd-4757-ae93-f6f3b4f5ca32.filesusr.com/ugd/1a2ce6_01b1bb4d2324445f944a5a713d719f9c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/free_python_machine_learning_books.pdfIn PDF document text
    • http://kexomuradalo.rf.gd/ieee_paper_template_word_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afe93eb2-7273-408e-b32e-a77832e3e9eb/market_marketing_plan_definition_and_examples.pdfIn PDF document text
    • http://banagegogidilad.rf.gd/how_to_reset_my_zte_pocket_wifi_password.pdfIn PDF document text
    • http://xogimutidum.epizy.com/98875790476.pdfIn PDF document text
    • https://3c3bf0af-c02c-43ee-ab56-a2e3f1f4987d.filesusr.com/ugd/97f7bb_cac570f8db7344d5b8001820e0d800b2.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_786b9e241c5a431fba8ab371c788cfd3.pdf?index=trueIn PDF document text
    • http://desetezovadu.epizy.com/zejanarowezalukitaxomajeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97db613f-f2da-4930-9389-6cf22a3faf77/bogejunumugekadofi.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/11147813195.pdfIn PDF document text
    • http://dimafox.epizy.com/new_english_dj_bass_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d201d2bd-c99f-43ea-afcd-0d90ee399bfa/how_to_use_a_traeger_timberline_1300.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_b97de0cffb91429a9ded3ece83901c2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f39c906-e2ec-4a2a-94e3-cd5178a5044d/xenesanixeruzi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12449 5240 bytes
SHA-256: d856300eef8215316f4dccb92d2def66c9d228e0c023b4518b1d457d34e9f495
font_01_sfnt_off00013647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13647 11600 bytes
SHA-256: c2d0237ce179b0088e66272edecea32d0dfd76dc31f595409e0ff05ffae82ebb
font_02_sfnt_off00015d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D30 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176