Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0355e0501fbb88…

MALICIOUS

PDF

70.0 KB Created: 2021-02-19 16:44:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8ada43c6223e5da3751932853e4acdc0 SHA-1: 790cfb529ff1748ed014c5a944d2c62db5470b86 SHA-256: 9b0355e0501fbb8816cf488a44aa3dfe57b2c8bb81a17202c068b05cbc2b3918
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors or link farms designed for SEO manipulation. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or scam attempt. Although no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect the user to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/wix?keyword=evan+moor+daily+science+grade+6+pdf+free In PDF document text
    • http://centerbluebadge.com/81463679381l1bh9.pdfIn PDF document text
    • https://vexifodukegaze.weebly.com/uploads/1/3/5/9/135977609/a7192a73.pdfIn PDF document text
    • https://disemorabegelam.weebly.com/uploads/1/3/1/3/131383982/wefogubo_visezavife_zizitubeme.pdfIn PDF document text
    • https://jasujoru.weebly.com/uploads/1/3/1/4/131483343/punixigosovuzozil.pdfIn PDF document text
    • http://ch-redirect.icu/tawuzemepevikezeknrs7.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/3357300.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/hci_accessibility_guidelines.pdfIn PDF document text
    • https://jejonogukoji.weebly.com/uploads/1/3/4/8/134864124/4b4bc.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/dalava/44007797811.pdfIn PDF document text
    • http://mepizegavipin.rf.gd/30607049010.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/tedudijaxuso.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/99322929774.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/british_journal_of_nutrition_submission_guidelines.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_off0000d20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20D 5748 bytes
SHA-256: 98ca9689b4a79546e292cb746a5ccbdd2ab2af8bd66f9f15da10067afd90e033
font_01_sfnt_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 10580 bytes
SHA-256: 1f584ae430bf259e7799a7e8d4b0e676b4f70e8fbf8d5c7bc9a9a64b7b56c5ed

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