Malicious PDF — malware analysis report

Static analysis result for SHA-256 953bab74e2d46edc…

MALICIOUS

PDF

63.8 KB Created: 2020-11-13 23:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 50d0935a49ae28974328f6c64c2d0892 SHA-1: 5249d7bd7777116681071046d78af4aed17fb4e5 SHA-256: 953bab74e2d46edc9588b598e1b47967132a42abe169507faa33888dcde090be
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are identified as part of a link farm or redirect to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Age of civilization android full apk', suggesting a lure to trick users into visiting these malicious sites. The presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly indicate a phishing or redirection attack.

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/aws?utm_term=age+of+civilization+android+full+apk In PDF document text
    • https://fiwuvoreguno.weebly.com/uploads/1/3/4/0/134000104/jeketex-kalekowejozi-zefimolamewuz-mafowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_5fae21e4e03a1.pdfIn PDF document text
    • https://lidenezat.weebly.com/uploads/1/3/4/3/134382714/pufuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_5fae8ebfdd669.pdfIn PDF document text
    • https://zazusixalug.weebly.com/uploads/1/3/4/4/134491239/pupilesali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_5f9a058d260b9.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/cbd9b395-701f-4df9-9417-0d1bc96a01d6/canon_mp610_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac867957-0f2a-4d3a-ad72-7c15a38ea1d3/60600502592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f30d44a-d076-48ed-9105-ddb2dc445b94/vitowinuwerekosepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90993c30-a90b-4d4c-9db2-3208872a3329/93465301278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01964515-0aa5-4ab2-9b8e-3ab3cb504aab/lidowixokowadix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd71b2cc-1063-411e-a18a-2e4a9704a02c/team_member_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/oxps_to_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd402747-bc08-4266-b9ec-2a416093792e/femumaponane.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_off0000ba7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7C 5308 bytes
SHA-256: 7a5331112a4a7a1d24aa6c2c0e48eb78f0a2f4d5a6cb31cfc0045394486ad8a4
font_01_sfnt_off0000ccb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB6 11292 bytes
SHA-256: 779d87399a101cc4fd4a2ee13fbcbbac699778a4f5524a826bd776f657c87814

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