Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae34c64cf118bed7…

MALICIOUS

PDF

72.4 KB Created: 2021-02-15 16:04:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a7d533e96e55dab2e5bb17123ca2f304 SHA-1: 6f75696265478b156852956d01e076d90d83bcc8 SHA-256: ae34c64cf118bed732076b711b1519a9a1a55c5824c25270131ef80c6a5cbb0b
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=how+do+you+clean+a+char+broil+tru+infrared+grill In PDF document text
    • https://static.s123-cdn-static.com/uploads/4425211/normal_5fced2a5ce6ef.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/1080345.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/voropa/difference_of_cubes_worksheet.pdfIn PDF document text
    • http://xafovam.epizy.com/chemistry_notes_for_bsc.pdfIn PDF document text
    • http://guxozuzemonixe.epizy.com/ice_cream_man_poem_questions_and_answers.pdfIn PDF document text
    • http://jofesowevelen.epizy.com/button_cell_cross-_reference_guide.pdfIn PDF document text
    • http://zivikabazixo.epizy.com/stainless_steel_gauge_chart.pdfIn PDF document text
    • http://jalovunenenema.epizy.com/pozajikapis.pdfIn PDF document text
    • http://sutobilesu.rf.gd/rupilejokonijepazibikeg.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/49873006051.pdfIn PDF document text
    • http://wonumamirevaz.rf.gd/japanese_learning_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/how_to_apple_arcade.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/4106164476.pdfIn PDF document text
    • http://vakabivemu.epizy.com/2d_video_game_character_animation.pdfIn PDF document text
    • http://gevewodex.epizy.com/81957308634.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_off0000dd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD50 5400 bytes
SHA-256: 78629e6399c8d2903e766a7fb9e606e4b01bf041f7f158d923748829cca5dec5
font_01_sfnt_off0000efc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 10748 bytes
SHA-256: 49017f037a22e049ad25af0acf59be0da8cd34bfb3158e40cf008c457eb8b0e1