Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba320aa04811382…

MALICIOUS

PDF

70.5 KB Created: 2021-02-19 01:26:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: df0cb2de4fec529985bc59c94ab2d4ed SHA-1: 58057bc3832db7f3f200f9347d2b7baf5094b8c2 SHA-256: fba320aa048113828ea0d978b878e142186a656f24c73376df3edc5de7fb40e4
254 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
  • 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://crophysi.ru/wix?keyword=seven+half+bloods+shall+answer+the+call In PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/dumowutasi_datusit.pdfIn PDF document text
    • https://xidatajabo.weebly.com/uploads/1/3/4/3/134375349/rupilonupenijil-vugenalemefeji-rawakebukologo.pdfIn PDF document text
    • https://lanudoda.weebly.com/uploads/1/3/2/3/132303217/4836025.pdfIn PDF document text
    • https://jeletizasi.weebly.com/uploads/1/3/4/6/134640559/2069110.pdfIn PDF document text
    • http://constructionhouse.info/razejafugivinotovelonejpbps6.pdfIn PDF document text
    • http://pe50off.info/775101370494gorj.pdfIn PDF document text
    • http://copyrights-notices-helps.com/99405240140ipevu.pdfIn PDF document text
    • https://rirenumu.weebly.com/uploads/1/3/4/8/134884077/sajinavizega-guvoxupenir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445726/normal_602b66adb6552.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/salegevevit-kaxiwojaba-galub-zirawuzen.pdfIn PDF document text
    • https://zenalebib.weebly.com/uploads/1/3/5/9/135966912/1390cb456d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/borescope_for_android_inspection.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/aldehydes_and_ketones_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/mathematical_physics_satya_prakash_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/adobe_acrobat_x_standard_patch.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_off0000d6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 5504 bytes
SHA-256: d4a72e725fdaeaf8e72c8d99c516fe618a9561999db032c67f11f9e48bbea27c
font_01_sfnt_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 10212 bytes
SHA-256: 9c649cba4a9cf11562816d98f386d1d168700a400b65682e1c742a03c4e907c7

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