Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5a567abe440df3…

MALICIOUS

PDF

74.0 KB Created: 2021-02-02 16:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 9ba2a81ddcae75dd95b6d57e99d6430c SHA-1: 284f04acf4f534175b506b7c2b8a4e75a8449aa6 SHA-256: 2a5a567abe440df3b4f80ed4ce3d372e76d13eb864afb36fb92fe81802e131cd
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://yafferge.ru/shook?utm_term=bird+dog+exercise+works+what+muscles In PDF document text
    • http://kabomodom.iblogger.org/16479153059.pdfIn PDF document text
    • https://rawofaweka.weebly.com/uploads/1/3/0/7/130775842/vegitojokene.pdfIn PDF document text
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/efcdb042.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/jabulagilaviso.pdfIn PDF document text
    • https://dorakipep.weebly.com/uploads/1/3/4/7/134747047/vavibilulalan.pdfIn PDF document text
    • http://help-violation.com/guitar_tab_sheet_creatorq95gt.pdfIn PDF document text
    • http://hookup750.website/3949477652mqjpk.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/fimojepaduwoxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://befojarariwowab.epizy.com/baxosiwodo.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/tiruxelafiko.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/69495115414.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/free_gantt_chart_template_microsoft_excel.pdfIn PDF document text
    • http://toloruware.rf.gd/hd_3d_wallpapers_for_android_tablet.pdfIn PDF document text
    • http://zudozam.epizy.com/keyboard_abc_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/33843299327.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/xusovitezopufexeze.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/lupifufatidemaboto.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/10061695250.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_off0000e5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CF 5628 bytes
SHA-256: 534fcd7860301cea3d2f95b93b00256252821f3e84b06fdf765bcef592ea3d88
font_01_sfnt_off0000f8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 9884 bytes
SHA-256: dfee25376f4bf27764ee0de86b369bf970d793be08623d6bcedd9aacd30fc25f

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