Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fdab510c4633b5…

MALICIOUS

PDF

70.9 KB Created: 2020-11-20 02:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2561e64a14b9a771c718d62571d2c4e3 SHA-1: efbeb8c28ec803d3c3b7cf6f41a1a4550909dc6f SHA-256: e8fdab510c4633b58030299ea3c6130c722578c67e795d4808a930a8b5545075
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious or unknown domains, indicating a link farm or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document body, though partially corrupted, references 'Antecedentes de la primera guerra mundial', suggesting a lure to attract clicks on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffine.ru/123?utm_term=antecedentes+de+la+primera+guerra+mundial In PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/pavadis.pdfIn PDF document text
    • https://xikalevu.weebly.com/uploads/1/3/4/3/134319979/wapuwogipowixidef.pdfIn PDF document text
    • https://wazurewimi.weebly.com/uploads/1/3/4/5/134598950/gafiwakusati.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/narixovolog-bibusidutowogo-pedofunalutisif.pdfIn PDF document text
    • https://jarofudi.weebly.com/uploads/1/3/1/4/131408364/bukogozexa.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/ecdb55ec-7c0f-4686-a541-1aeca896c2a6/shared_powers_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/wubetotozupanezonof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7922578-348c-4b20-9374-913d3c8437d2/salis_essential_oil_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3548d65c-4c9f-4bcc-ac94-c041dbf68029/sojiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38de0f2e-f0e9-4a2e-ac1a-9fa20dc7313e/download_gmail_icon_for_desktop.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/notice_of_intent_to_lien_form_illinois.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/zogujedakuvadupogizuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f9cc328-dc18-4601-a676-207d21608bd2/kozinawuxezojivetozolod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6780dce-eda2-4a5f-9bb4-72a1b7774c1e/sarasota_to_tampa_airport_shuttle.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/53583812537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97cb2da5-aa9c-40f8-8fee-c6c64cc9482d/ncert_9th_grade_math_book_solutions_chapter_13.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_off0000cbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEF 5152 bytes
SHA-256: 785aa9be63359ffa493444644555100bec3426b32287e46c32cc094452c37d2d
font_01_sfnt_off0000dd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 10744 bytes
SHA-256: 6c57055c9b469ffe7f31c139bf42e96a5179f5fec8a0938005228654a04f6391
font_02_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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