Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac69c52327ce6d0…

MALICIOUS

PDF

69.6 KB Created: 2020-12-23 00:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 359eb00fd12dbc6d02992d74a75ccde2 SHA-1: 20d5afd7568377df68ed6c40d5746e675e69a1d7 SHA-256: 9ac69c52327ce6d0cfdd6ebc9bba40272b78cfb17115802e9d40d11dbc41fa6e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a direct link to a known malicious redirector, which is likely the primary malicious function. The document body, though heavily obfuscated, contains text related to local business searches, aligning with a phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/strik?utm_term=wings+place+near+me+open+now In PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/pupuwukuvo.pdfIn PDF document text
    • https://mubazujozij.weebly.com/uploads/1/3/4/7/134705676/vufebilixojojov-fexuna.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/6583597.pdfIn PDF document text
    • https://kutemipemowu.weebly.com/uploads/1/3/4/8/134860595/9216912.pdfIn PDF document text
    • https://fesinukovib.weebly.com/uploads/1/3/4/7/134715349/9709648.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/burekorem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387242/normal_5fe27032e9d98.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/9559360.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/48fe7716-2c13-4436-a1a2-4822d79397d3/461390780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e9f2e32-ac9a-4788-8676-acb73de5325a/fortnite_gun_sounds_1_hour.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/43920609200.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/r_c_h_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/77972924777.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/5716950116.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/pesafojofefokimibijew.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/kuwinipowozajeliw.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/axis_mutual_fund_nomination_updation_form.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_off0000d40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40F 5356 bytes
SHA-256: 32fb688fb585e10e2f80f19787d6439a2c8ba28d8d89ce892718ee5814133371
font_01_sfnt_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 10336 bytes
SHA-256: 57a223f82ceaa62c6b3c8aeea704d447d2a7868a1f32dde0cc3effe45a1131fe

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