Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd3ec51736e5605…

MALICIOUS

PDF

73.6 KB Created: 2021-03-02 05:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0a3ed426f4532947dcb6b2a6b421ebc8 SHA-1: 9bd27038801e63ca1e0dfd15ee8d5ee2e4e2d103 SHA-256: ecd3ec51736e56059950c486b775bbfd21b13b02b31e9e6de58d8111695cc16f
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/wb?keyword=best%20country%202%20step%20songs PDF link annotation
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/b57f2bc.pdfIn PDF document text
    • http://ravapusevuj.iblogger.org/biophysical_techniques_by_wilson_and_walker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_5fc9f910606f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393752/normal_5ff086430d67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_602258d0ec8fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_601e3b0a60148.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/xozowag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470835/normal_5fc7a784d19ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_601999f44c2a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415531/normal_5fc8ad10b12ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefamin.rf.gd/is_rock_band_backwards_compatible_with_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/how_do_i_know_if_my_baby_is_breastfeeding_enough.pdfIn PDF document text
    • http://ninunebuxidumeg.epizy.com/digital_photography_classes.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/66321189153.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/adulthood_stage_of_human_development.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_off0000e3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 5140 bytes
SHA-256: be6e9b90352ad218b54ff99010d3ed15640692b8209a57af266662ef1226bd41
font_01_sfnt_off0000f55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 10716 bytes
SHA-256: 6fcb80b9b909b776b41cd93d5d357c438484478ac511dd6f86176abab25943d8