Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82cc399c81356ea…

MALICIOUS

PDF

67.1 KB Created: 2020-12-17 05:53:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 04e6b5b3b247f8f9575f9adb1541bdb3 SHA-1: e85e7d564015dc4af84415100bb6abd54cc0a8f4 SHA-256: a82cc399c81356eacf3567fc656dffc90b3df8191c5f6255fc1758be065e9019
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple embedded links, with at least one pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external PDF links suggests a link farm or redirection scheme designed to lead users to harmful content.

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://ggtraff.ru/strik?utm_term=google.com+block+sites In PDF document text
    • https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/1631450.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/kesefura_jegejuruj_nonodasa.pdfIn PDF document text
    • https://fizakilugoleji.weebly.com/uploads/1/3/1/4/131438405/5b6ba0d3a4.pdfIn PDF document text
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/lizaga-mukeneligewowo.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/buxoparadazegu/angielski_w_tumaczeniach_phrasal_verbs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc531fa405d5340f345b286/t/5fd67d473ebe04163163f4c4/1607892297326/greenway_intergy_ehr_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/argala_stotram_sanskrit_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/fakanesogetanuwogokozeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ceba916-abac-49cc-9203-26882fb57da2/dickens_village_price_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/data_analysis_with_microsoft_excel_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb4ce188-73c3-444a-9596-95da08d73163/qdoba_chicken_recipe_instant_pot.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/40517455539.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_off0000cc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC02 5080 bytes
SHA-256: e1f3bdc3f16de6bbfe4a0dd702f97af90efbead009cc2da689b39dd0d10d46dd
font_01_sfnt_off0000dd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD52 10160 bytes
SHA-256: f3f67bb0a4747d5fa939606419a271e658693b4330961f04bbd46ca0d76c5ff2

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