Malicious PDF — malware analysis report

Static analysis result for SHA-256 45df5d144cd0124f…

MALICIOUS

PDF

61.2 KB Created: 2020-12-07 00:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6141b1b9b52ee00a201ce14c71650e24 SHA-1: d45f656b6618f19d75de1546b0471f10ff95e1e3 SHA-256: 45df5d144cd0124f44d64b21f2a7bc9e2bf666284ccaa1e16855c30302faeff4
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirectors and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the presence of malicious URLs and the PDF structure itself suggest an attempt to lure users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?utm_term=google+docs+how+to+remove+page+break In PDF document text
    • https://suzefajadovu.weebly.com/uploads/1/3/4/5/134592553/kinesefig.pdfIn PDF document text
    • https://kaxutaxi.weebly.com/uploads/1/3/4/3/134387751/75313e8.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/e7eaab0b0ca.pdfIn PDF document text
    • https://suzilevovovo.weebly.com/uploads/1/3/4/3/134310132/8077269.pdfIn PDF document text
    • https://guwewekotijiz.weebly.com/uploads/1/3/4/7/134714515/jalimokiza.pdfIn PDF document text
    • https://zipibolusoxa.weebly.com/uploads/1/3/4/6/134627603/3493450.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/7473a13ecca39c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/loneminovu/pipekaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc587e7affbf90a6609e8ed/t/5fc8a72eee804a17a1d6a111/1606985519347/air_hockey_free_image.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/dawumozibu.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/brainpop_world_war_1_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/everquest_power_leveling_guide_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/famous_people_from_louisiana_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/fpsc_challan_form_2018.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_off0000b2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BB 5876 bytes
SHA-256: 371ba077041c5d4f522e570d7da665600d2fb73c54c17b75c67750203c136d48
font_01_sfnt_off0000c6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A7 9836 bytes
SHA-256: b01b7179c515177807cdb716de47e7347a1f2f49d00032864db9dee213a70b8d

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