Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d791271f5d3192e…

MALICIOUS

PDF

73.9 KB Created: 2021-06-10 06:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fceb778c77bd29bf1943499a8cedf4f2 SHA-1: 781d75e114a050fd59d37708c026b873d7a967d5 SHA-256: 8d791271f5d3192e4bdefbcfce03a8a73429c3caed0e1635f74911c24f1f0ae9
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on link farms, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a URL related to 'fortnite download hacks' and a critical ClamAV detection for 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://chcial.ru/pbw?utm_term=fortnite+download+hacks
    • https://cdn-cms.f-static.net/uploads/4374699/normal_602fb3ebd2f7f.pdf
    • https://lotigasi.weebly.com/uploads/1/3/4/7/134705720/garafobipa.pdf
    • https://puzagetidorijes.weebly.com/uploads/1/3/4/4/134495880/eaaa45bf86368.pdf
    • https://cdn-cms.f-static.net/uploads/4391925/normal_602829d3d1c5f.pdf
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/nerusoj_dijerupawagoto.pdf
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/8d4971.pdf
    • https://cdn-cms.f-static.net/uploads/4456393/normal_605fd12b796c3.pdf
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/tatakotexoboge-jozudidof-wurogeti.pdf
    • https://cdn-cms.f-static.net/uploads/4484376/normal_6061fe2277941.pdf
    • https://dumiwexadanona.weebly.com/uploads/1/3/4/5/134522913/sovured.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e15bfaa8-ca2b-41cd-8e08-a38ffa2d0c2c/76379389829.pdf
    • https://uploads.strikinglycdn.com/files/39d0c2bf-b5eb-479b-965c-1f12ae34288a/logitech_wireless_headset_h800_price.pdf
    • https://uploads.strikinglycdn.com/files/379486e3-b417-4fdc-a8a7-d64ad5941aac/91888371746.pdf
    • http://kejufavo.pbworks.com/w/file/fetch/144919194/bowebiralabofominimol.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ae.bin
3e97868ca061109896c46734f6c86c5faaa45e30f9eedc8b2a56531e3fe865cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AE 4924 bytes
font_01_sfnt_off0000e76c.bin
2e65ee93900e66b67e76c1ac7ccad7690fbc708a1c3252f4c89324a788732d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 10904 bytes
font_02_sfnt_off00010ca5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA5 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.