Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dee893f305e6fe5…

MALICIOUS

PDF

67.6 KB Created: 2020-12-19 15:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ab7208d9742d455b4b57c7fffd1951aa SHA-1: af2c1e62b26ed864c7439dc6eb9ed7d6c2be3382 SHA-256: 7dee893f305e6fe54cecc845b98fb51a2262c27c3fc3fbf20e90ef76822445b6
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. Another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=how+to+cite+the+bible+in+apa+reference+page In PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/samakisegote.pdfIn PDF document text
    • https://zolegezuboz.weebly.com/uploads/1/3/4/4/134462972/mupaso.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/pazifetanegapu/loguguvej.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9b8ef7301f8b108504/t/5fc32f3e145a8629dc1886b7/1606627150501/white_horse_village_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/minority_meaning_in_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/88439355938.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/wonisi.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/corey_wayne_how_to_be_a_3_man_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/zifuviketofevenazobigox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd539cc66bff209e8009b6/t/5fdd6d9f2da99c28680647a5/1608347040272/best_4k_video_player_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/67494179169.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_off0000cca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA9 5292 bytes
SHA-256: 23fb0f69d74f06f4f9272a5687ddcfaa06b15398725cea1551541ff17267cec6
font_01_sfnt_off0000deba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBA 10144 bytes
SHA-256: 08f9a5c9ffca5dc823237686bc156c0d9910cc10e815c892e4405efeb89a9a41

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