Malicious PDF — malware analysis report

Static analysis result for SHA-256 679e14c8134949b3…

MALICIOUS

PDF

76.7 KB Created: 2021-03-06 16:08:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0d9e0504fb017a76ba5ff67c954fbc00 SHA-1: 893913ef66b98df4deba408a317721fb9dbdcaab SHA-256: 679e14c8134949b35a2250aae946d2ade5442cf0afc500b4f1075f69067b1c69
254 Risk Score

Malware Insights

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

This PDF document contains numerous links, many of which point to redirector infrastructure, including a critical finding of a link to known malicious infrastructure. The document body, though heavily obfuscated, appears to contain text related to 'Alex rider book 12 nightshade', likely a lure. The presence of multiple SEO-optimized PDF links suggests a link farm or phishing campaign aimed at driving traffic to malicious sites.

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
  • 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://yafferge.ru/123?utm_term=alex+rider+book+12+nightshade In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_5fd21cfeb72bf.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/etq_tg1200_generator_carburetor_adjustment.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/3NXhhgi/nafonabis.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/wowopifapubogugo.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/yellow_in_rgb_values.pdfIn PDF document text
    • https://cdn.sqhk.co/fixosotefe/cUie5jc/63676735029.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/2dhb36V/71598608877.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/why_is_my_chainsaw_leaking_bar_oil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456132/normal_5fdf930c97f74.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/6omiyha/sorojutinunuvabesorari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383566/normal_602badbfda019.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/why_does_my_headset_not_work_with_my_xbox_one_controller.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://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_ef17af8e96f6422fa0ab4943a72a15d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/chrome_linux_kali.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/52346866124.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_21ec92ca7b804c21a12c59f651df5645.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/jovotitogunadenuno.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/wulolezexo.pdfIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_b6679602a60c4c9091a830875fb66c76.pdf?index=trueIn 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_off0000e0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B2 5320 bytes
SHA-256: 17c9b7c44ea09431b4b63cf05049b482179a7391b63726f430d7b8653e3a49b3
font_01_sfnt_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 10732 bytes
SHA-256: f84200805ff2162435b4dff993a45f676ea1140abb25c589c06a991a184a43b3
font_02_sfnt_off0001178e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333