Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fbc498aa62aae2…

MALICIOUS

PDF

70.3 KB Created: 2020-12-27 04:37:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8de5986a8e12473f8ff74d4b64590124 SHA-1: 22343bcd4dc42ca108d1ccd602f506790758d5ea SHA-256: 48fbc498aa62aae295da53c26de106dd514ebf85d6b0773e3e581a6465828f5e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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://ggtraff.ru/strik?utm_term=sony+music+center+pour+mac In PDF document text
    • https://cdn.sqhk.co/kibizatududo/3ighbjj/vomametojajadivazamabi.pdfIn PDF document text
    • https://gebogezajir.weebly.com/uploads/1/3/4/6/134685536/9787044.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/jeqREjc/modern_world_history_textbook_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/ieieija/streamlabs_alerts_not_showing.pdfIn PDF document text
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/farezetetewese-fetezexaruv.pdfIn PDF document text
    • https://bapidovomefizeb.weebly.com/uploads/1/3/4/3/134382768/629871680a84ea.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/gFibhjZ/dunojesafokinuwujudiduli.pdfIn PDF document text
    • https://tiludidiliduw.weebly.com/uploads/1/3/4/3/134385670/e04ed.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/iajicvD/idle_tycoon_space_company_best_crew.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/tinezedu/38680581128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f86a84-6f94-43c0-a812-de0b2044cd82/gebamotizunijisanu.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/15729962026.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_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 5252 bytes
SHA-256: 681e9421180442d0df32b15b28c53c6ff985482312d1589660250918eb01bc00
font_01_sfnt_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 11912 bytes
SHA-256: c7c2f9a31eda7a827e44a72336d347979272de61470861a46fd2d1db543970a8

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