Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2e3a660626f1af…

MALICIOUS

PDF

107.0 KB Created: 2020-11-20 03:03:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9e3372724a6ec332ca0d3c977448dda6 SHA-1: 032fe8698997261329415632d3b3b4bd177fc775 SHA-256: ed2e3a660626f1af4c720b5eb1169df55873e53e5e2c02ebab4b8f9f16ff4fa0
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 link to known malicious redirector infrastructure. It contains a large number of embedded links, many pointing to external PDF files, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

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://traffmen.ru/aws?utm_term=critical+role+campaign+2+podcast In PDF document text
    • https://majaxufekebobuw.weebly.com/uploads/1/3/4/6/134605083/4297983.pdfIn PDF document text
    • https://gapudozesaneg.weebly.com/uploads/1/3/4/5/134525911/mebowokusepev-nufize-dalugile-nuzovodinusujow.pdfIn PDF document text
    • https://rojaduvesasesa.weebly.com/uploads/1/3/4/7/134751848/5668674.pdfIn PDF document text
    • https://masejufubalabej.weebly.com/uploads/1/3/4/3/134388341/zemuwekesu-zimamesufugavu-jiseminen.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/baxekojojexusol/burns_middle_school_fl.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/68044639668.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/28720_mistletoe_warsaw_mo_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/nazurovezan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42c3491f-7707-4403-a2a0-daf353b10af2/8335467604.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/english_book_9th_class_punjab_textbook_board_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce5bb9b-785f-4df0-a449-c8cfd792482a/71473768792.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_off000164b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164B8 5428 bytes
SHA-256: 6b20f2a30f44353ef43850efc9a0b5e320adbc7c8684fbbee6029b06b41cbeb9
font_01_sfnt_off00017710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17710 12236 bytes
SHA-256: 94ffe6dc8abb1461937a39f17eb5003891fb8ffabcf2c50f89aa5499c5a1c62f

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