Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2cf87a84b12454…

MALICIOUS

PDF

66.3 KB Created: 2020-12-24 00:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 830ed53833c7ad68abaaf03e12a5e4e7 SHA-1: c9c74bbe0af4b2c30c18de6bb38cb948437febad SHA-256: 7f2cf87a84b12454881dcbd8a2c517a79da48de4b7db210524f0807d5fad51da
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files with generic or potentially misleading titles, indicative of a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these external links. No scripts were extracted, but the PDF structure itself is used to host and present these links.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/aws?utm_term=brno+hlavn%25C3%25AD+n%25C3%25A1dra%25C5%25BE%25C3%25AD+informace+telefon PDF link annotation
    • https://cdn.sqhk.co/bafebolabefo/RQ7HSAx/malaysia_real_name_basketball_wives.pdfIn PDF document text
    • https://vijativu.weebly.com/uploads/1/3/4/5/134597759/vulozokiwo-waleworu-xokutarubatipo-tusobiperi.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/RZK7d5D/past_present_future_tense_words_list.pdfIn PDF document text
    • https://subulutug.weebly.com/uploads/1/3/4/3/134349811/lataxu.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadumiza/SNPhgqP/tubemate_video_songs_free_download.pdfIn PDF document text
    • https://vefubonipit.weebly.com/uploads/1/3/4/7/134719522/toxagilenukobusiv.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/tuletivotarupu/fugudizumegerazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc595334-e1cb-4fa4-8a02-2e80644ebf7d/4192544025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/181d0863-7ff6-4a95-ab3e-7fdf4901ec98/61940910200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c63a4e11-6531-48d9-98cc-d1c61985dd48/25804589524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cbcf560-6256-4b81-b2af-a152d34f5282/popuzosidududijagajez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e411f2-47c7-445b-9458-431f86ee6b26/akhenaten_nefertiti_and_three_daughters_artist.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/91394580100.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_off0000c0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DF 5560 bytes
SHA-256: d9079cb7809726f36171e63ba66fb091e08d5760041095f145869843d8734be2
font_01_sfnt_off0000d325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD325 12740 bytes
SHA-256: 5467eea77c046662d637a723c8a232ebe25935d22d9186cf409aae0061e90072

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