Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aeda3ad6547e5d1…

MALICIOUS

PDF

76.4 KB Created: 2021-05-28 11:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5fb48da8deb8b54bc39a29f0f0370221 SHA-1: 24467f3330c9c843daadb8a5499e78c717cd3718 SHA-256: 0aeda3ad6547e5d134fe9ceef01ed61744241c2f1a29bd23505fed51da6e8550
156 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a download for a movie, which is a common lure for phishing attacks. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm used for SEO manipulation or to host malicious content. ClamAV detection and ML classification confirm the malicious nature of the PDF.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/strik?utm_term=download+film+bulan+terbelah+di+langit+amerika+full+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4401505/normal_6005caa48f667.pdfIn PDF document text
    • https://xuminewas.weebly.com/uploads/1/3/7/5/137500686/jejenumukub-vefisibotixe-numul.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/3630430.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403130/normal_5ff94268ae331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_6017106eb8162.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377912/normal_5fc59fdace4bd.pdfIn PDF document text
    • https://tedunifadikave.weebly.com/uploads/1/3/7/5/137505165/4262ed24908439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_604aef224ca85.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/f9252c06-7c21-451d-a469-ad4b0a2081b3/48806876288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98782e4e-41b7-4362-86a1-ac056347f625/78632814547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e92b772-cdd0-4914-9824-e01f6dfc4505/air_fryer_recipes_healthy_weight_watchers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11041e5d-d03f-44fe-9005-dc59cd6a25ff/94469568682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ef2d99e-e5f8-4bb4-bf7c-91404ca91beb/is_there_a_keystroke_logger_on_my_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5411d6d2-3df1-41fd-b04b-b455793244ca/lanimivewelitovoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d252e3cf-7a7b-4c7f-b577-a305b8fca7a4/zakofapej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37bcc5d1-465d-46c9-a4e3-6721215db744/what_is_the_difference_between_direct_band_gap_and_indirect_bandgap_semiconductor.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_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 5500 bytes
SHA-256: df82634674a427eac421a7b2a1968de927b84b994eb21affbf5ee4f5325e68f4
font_01_sfnt_off0000ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 10900 bytes
SHA-256: 6c45ab568522b59228e4ef7fa5eb4ff8e894abe1bed82f1e6d13926b1b389751

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