Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af9d7506fe9da2f…

MALICIOUS

PDF

68.7 KB Created: 2021-03-01 20:09:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f4eca188016b377e49bdb9e25f07bef4 SHA-1: 9bec12b39ab93b9524c722c6f2b620adc53aa22a SHA-256: 4af9d7506fe9da2f3155bc7bb270d58dcd141864c3d28628b59e7e71ba30424f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/wix?keyword=roll+a+joint+apk+uptodown PDF link annotation
    • http://tafakiduwav.scienceontheweb.net/what_kind_of_person_is_roger_in_thank_you_maam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381528/normal_5ff858e606fa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381737/normal_5ff2cc362dd41.pdfIn PDF document text
    • https://mogisitubetaw.weebly.com/uploads/1/3/4/4/134496388/033d7538e1953c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371553/normal_5ff9e7cbce822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_600340c7b7f19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393028/normal_5ffa12af0054c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_602b0b6a50ffd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408172/normal_5fe2624d4706a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449984/normal_5fcaadcd54f50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476272/normal_5fd175e4657d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bitines.myartsonline.com/88384680258.pdfIn PDF document text
    • http://novogizeboje.myartsonline.com/motorola_xpr_7550_kydex_holster.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/soundlogic_xt_powerhouse_manual.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_off0000d3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E7 4916 bytes
SHA-256: 24dc7c7a47df6ae2539853290e06cae2fc9af6af20dda7ade4fac780f2c67571
font_01_sfnt_off0000e4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CE 9764 bytes
SHA-256: 13bd3ec74b42019561971977f8445fb2b3eae570a88b4dc252d0efe199f60334