Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af10e16fd66c9de…

MALICIOUS

PDF

64.4 KB Created: 2020-10-11 22:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 79080889386fe46379303c29c06a41c2 SHA-1: f0ad7ca844c6bad9324a755f10adb92da85a582e SHA-256: 7af10e16fd66c9dee7c021d92c58cc4aede15583644ddeb2dfad5d6a1d1bd89e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/strik?keyword=moon+glass+book+free+download In PDF document text
    • https://site-1038810.mozfiles.com/files/1038810/49183749637.pdfIn PDF document text
    • https://site-1039797.mozfiles.com/files/1039797/37614123024.pdfIn PDF document text
    • https://site-1048474.mozfiles.com/files/1048474/kazonikanaf.pdfIn PDF document text
    • http://files.mrsventurasclass.com/uploads/1/3/1/3/131384605/bolikusofesubonugike.pdfIn PDF document text
    • http://namizik.berryflats.com/uploads/1/3/1/3/131381464/nejigetup_xifigolobu.pdfIn PDF document text
    • http://riziwu.summitorthosports.com/uploads/1/3/1/3/131379730/697df50df4d.pdfIn PDF document text
    • http://files.drsa-web.com/uploads/1/3/1/4/131410747/120b8ae9147fa7.pdfIn PDF document text
    • http://files.uwanetballclub.com/uploads/1/3/1/0/131070604/jumob.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/1/0461/8122/0505/files/gewujiwova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/kitijisazaxaridigun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4477/2759/files/software_testing_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5899/3558/files/56582759691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9100/4066/files/26573388672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/peropedarixasadewujigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9305/2571/files/hello_my_baby_musical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/hackers_game_mod_apk_latest_version.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_off0000be49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE49 5376 bytes
SHA-256: c9ca0013e6bdcf1d00775d438e38c12d2c985bcdf8b3ebe711f7600c2728e913
font_01_sfnt_off0000d0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C5 10420 bytes
SHA-256: ecb1c8021b75e5136f3192ab19d13c29558ee2ca8ae21fd0929df94fa3e91eab

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