Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d01bc71f22ddb1…

MALICIOUS

PDF

69.2 KB Created: 2021-03-06 10:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 82c4db7598e6eeb35db3c91fed5947f5 SHA-1: fca907967c32391f55c6bd48c4a7fadc094e121e SHA-256: 49d01bc71f22ddb1f1fd2a4c2d6ef8fe709c43fb10883f395e45f2ac9bb8859e
214 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL that is flagged as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, suggests a lure related to a movie title to encourage link clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://yafferge.ru/123?utm_term=el+conde+de+montecristo+pelicula+online+subtitulada In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fd998990f47f.pdfIn PDF document text
    • http://sovetnik53.ru/genomed19rn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423155/normal_6021ce4ed493f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459175/normal_6027a56aa9975.pdfIn PDF document text
    • http://bovakepixoworax.iblogger.org/ropusefapibivizovuwumewo.pdfIn PDF document text
    • http://zoxatib.iblogger.org/torurarogosiloteravaf.pdfIn PDF document text
    • http://pshcomonhere.xyz/whats_a_synonym_for_employee8s5h6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://84d655c4-d84a-4a0c-9c32-0387925bd622.filesusr.com/ugd/6233da_7ed55acbdddf4d6bb20f8090b8c262b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/78701877119.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/longman_dictionary_of_contemporary_english_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/les_miserables_2012_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c73fd2-6911-4cc7-9f08-2a6ae6cda19b/phrasal_verbs_with_examples_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/62022121739.pdfIn PDF document text
    • http://podepabat.rf.gd/78923114929.pdfIn PDF document text
    • http://jefokilekik.rf.gd/what_size_battery_for_nixon_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/possessive_adjectives_worksheets_for_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef009847-1c8d-42a1-8782-f352cbfdb896/nawedapi.pdfIn PDF document text
    • https://1b6cb5a1-0716-4815-a0ff-d4d806105337.filesusr.com/ugd/94e5ef_8c40edf247ae4618b9c1bafe2e058361.pdf?index=trueIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_c58fbb6074cf4b68b15ea0522dc980ca.pdf?index=trueIn PDF document text
    • http://rajiwewovipu.epizy.com/turboprop_flight_simulator_apkpure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc156fa5-e93f-43da-a439-68c23ad414c9/76266357973.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_off0000cf03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF03 5316 bytes
SHA-256: d300f58acf3fad447df7f087e1e05910180afed7c933eed7e5f579a86b0148c1
font_01_sfnt_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 11172 bytes
SHA-256: a86b80561d1b6fd7fafc0c5edc8b315265fd7c792dffdbe46fa7573518da11f1

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