Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f06087694dece9…

MALICIOUS

PDF

66.5 KB Created: 2020-11-13 22:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 50360ff3578902d89b1b9345e139baa0 SHA-1: e2a5860eb876a6ac8fb0d7de76dfc6c713d6e224 SHA-256: 30f06087694dece9ebc2638a10335856ab499f8f214b48f05318e6d8470f79ee
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to redirectors or SEO farms, indicating a phishing or malware distribution attempt. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK suggest the document is designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffnew.ru/123?utm_term=the+rock+cycle+worksheet+%25231 PDF link annotation
    • https://vajuwapokovis.weebly.com/uploads/1/3/4/3/134361820/dabaxaxasidej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448548/normal_5fa338261ef27.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/0f20ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f8bc7cbbce12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5efd6e-9b7e-4d60-aeb2-5071b5af6b3f/information_on_gadsden_purchase.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/terrarium_tv_download_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6da67c50-7fc5-4b05-88be-3cc597f427a2/24744441957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b7956e-d05d-4e59-b251-1d99c0fdde3b/6010131416.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/new_sweet_good_morning_images_download_hd_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55c6488a-121b-4af9-a01b-e9fbc2c23b45/stone_poneys_different_drum_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/norman_rockwell_thanksgiving_dinner_painting.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/65958284734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213705ed-bae0-40d2-811a-cac39368fb02/nuzabipisumobarufi.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/jinikonipezoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d637049-1ff7-4c9e-b257-0d9ad4a5e395/new_balance_shorts_size_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/32526547223.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_off0000ca3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3B 4884 bytes
SHA-256: c95ce6ff2d470d028d5cddd49e990e3a2c0e447f72a415ede8fe8e00ba028c4a
font_01_sfnt_off0000daef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEF 10224 bytes
SHA-256: f03ec3135345b4bd34c630865f387a899db38ac4c2483561d868c7d05173bbca