Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed8104a01befdff…

MALICIOUS

PDF

99.5 KB Created: 2021-05-14 22:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f4bbfb43734cf125accdd91aef441004 SHA-1: 4294d9d7a36eb70efae6a440776231e325a86e46 SHA-256: 9ed8104a01befdffd0c6ecbd63356d85f3f9a6b9ffd45b09bd20e546afbb1b4c
234 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to a 'parts diagram'. The presence of numerous embedded URLs, with at least one identified as a malicious redirector, indicates an attempt to direct users to harmful infrastructure. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=hoveround+mpv5+parts+diagram In PDF document text
    • http://xuxevifitadizer.iblogger.org/business_communication_meaning_and_definition.pdfIn PDF document text
    • https://naloxepakore.weebly.com/uploads/1/3/5/3/135391327/litutimatek-zebeko-mumulolet-gopal.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/fuvoduwilula.pdfIn PDF document text
    • https://reratedazakowim.weebly.com/uploads/1/3/1/3/131378897/8812714.pdfIn PDF document text
    • https://zumegopepotiko.weebly.com/uploads/1/3/1/3/131398003/rinafuwiwen-laribum.pdfIn PDF document text
    • https://bogobesupagal.weebly.com/uploads/1/3/0/7/130775478/9707630.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_a359a094480d440c9a16fd714c7cff50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/godewumazek/could_should_would_esl_worksheet.pdfIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_bd01d51e0e2e41c0bd9d95388865335d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/beautiful_powerpoint_background_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/christmas_logic_puzzles_printable_free.pdfIn PDF document text
    • http://satekivu.rf.gd/zewutazul.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/how_to_install_lux_tx9000ts_thermostat.pdfIn PDF document text
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_7cef069833754d3b8414c8dbe0249f72.pdf?index=trueIn PDF document text
    • http://jefebewo.epizy.com/bambai_tamil_movie_cut_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/62913742031.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_0818a53a5a6a4b8dae9cb2168cd144b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/folic_acid_5mg_tablets_patient_information_leaflet.pdfIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_811940bc6fd54472a542791427e946b2.pdf?index=trueIn PDF document text
    • https://beca70af-11ea-46d2-a649-d7fd44c468ee.filesusr.com/ugd/dd41e2_2a6514b493b144248a166789361c43fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavobawum/adverbial_form_spanish.pdfIn PDF document text
    • http://sotilikesad.epizy.com/elementor_gallery_template.pdfIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_309211b02a74404ebaa310564d1a4a8e.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14888 5392 bytes
SHA-256: e7eee123a5c8d177fc4a805bb07384b6acc69f5a6f2ac45551a121de72fa39c1
font_01_sfnt_off00015ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC8 11136 bytes
SHA-256: 502f7f6c153fac0df5f079a82d190a7f30eea7beb489f449a392d5f9cbac6286

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