Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad520736048acd62…

MALICIOUS

PDF

54.9 KB Created: 2020-10-15 19:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 586e3169fd8f738b64f6ad089ffcadb0 SHA-1: ec8a0904689f1498167f8b59fe898bb1657d25f2 SHA-256: ad520736048acd62dc8fefecdb54aecc66ea1e8e65210d1bfdf8c48d30020ad6
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?keyword=left+4+dead+2+apk+download In PDF document text
    • https://site-1043445.mozfiles.com/files/1043445/49439012687.pdfIn PDF document text
    • https://site-1048172.mozfiles.com/files/1048172/94290357735.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/kedoxezezaj-temolej-zunemalavorun-mutelokowomimi.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/rarikavabemis_nadavutidur_nutalelodate.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/nazobupe.pdfIn PDF document text
    • https://tamagokevalagir.weebly.com/uploads/1/3/0/7/130776783/garejidonuxuf-tevapev-roxomefaju-gekolu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8660/1120/files/jugar_warmerise_red_vs_blue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6262/2883/files/buxikulipidagarejevogutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/2018/1414/files/it_works_double_diamond_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2564/8797/files/gubokiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/rawafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1301/2630/files/46845081476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8036/7780/files/spotify_premium_free_apk_root.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/natuxesaginilosusupogof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8282/4862/files/population_density_worksheet_6th_grade.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1C 13872 bytes
SHA-256: f4c2e4ffcc018cd129894cc7f99e256e502479c1bf81e5ccb04eb5b3c9dd18c5
font_01_sfnt_off0000958c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x958C 5076 bytes
SHA-256: 556821f461ac11b45e98aeabd11b0f9e673d4dd6db9e7a55ddb7d90470f0bc66
font_02_sfnt_off0000a70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA70E 12188 bytes
SHA-256: f37e45dd8ace6036f735a681c4905af7f3636b92f30f80bb70910b56855f56bb

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