Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ad3f7a2cddfc37…

MALICIOUS

PDF

60.5 KB Created: 2020-11-23 16:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c4e280c25228a7201023263a33790cb5 SHA-1: dadf03420beb8709eee2cb50a8f012d1eb48b351 SHA-256: c7ad3f7a2cddfc374c98d59705ddc8efc6df2efd7707aa453a70d773d15eb05d
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, forming a link farm, with one critical link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to streaming and application metadata, suggesting a lure. The presence of multiple PDF links and a malicious redirector indicates an attempt to lead users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=insya+allah+sah+streaming In PDF document text
    • https://zekulosig.weebly.com/uploads/1/3/4/6/134689557/4f2ce.pdfIn PDF document text
    • https://silajawa.weebly.com/uploads/1/3/4/3/134339193/59f25e1dc077d03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_5fa950123cc59.pdfIn PDF document text
    • https://satijezusadevu.weebly.com/uploads/1/3/4/3/134310115/8341002.pdfIn PDF document text
    • https://lerivifaladadov.weebly.com/uploads/1/3/4/3/134334847/sijaxituluzimuzi.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/datarofapakil/ccea_gce_timetable_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/24945611574.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/21080254337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb3daaf-bcfd-4e66-ab9a-6ccd7a301f13/73296575597.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/fibopefewujurotawixili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4205d854-5bcb-41f2-8343-c012897191a8/48690199762.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/xexukanokawuzotow.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_off0000b0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A6 5140 bytes
SHA-256: 4ef60afeb852304e94faf6e437c3a48ebc9bbc49a53433c2c9e6c1bbd85910c7
font_01_sfnt_off0000c1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F9 10624 bytes
SHA-256: cc3aed480f7020f33a1c112af8736c86a6c864db49eafcd06978c0db7b4e4ce8

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