Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dbbe2ac047d62c…

MALICIOUS

PDF

78.9 KB Created: 2020-12-23 13:31:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7b7b42d9420e415fc294b7abd9a39f29 SHA-1: 9715fdd59f9a790db3909cfd26417f5b7a6b38e5 SHA-256: 08dbbe2ac047d62c97733f22d92134a57bda2847a27f6195b54cd74477a06456
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Fiji airways a350 business class review'. The presence of numerous external PDF links, including one to a potentially malicious redirector, indicates an attempt to direct users to harmful content. ClamAV detection and ML classification further support its malicious nature.

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://cctraff.ru/strik?utm_term=fiji+airways+a350+business+class+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5fd2ea6491f9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_5fdc14be8598a.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/a25f98bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417128/normal_5fcf28c74ed4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472764/normal_5fd3b49b98753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5fc262d26bf31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_5f9fd8fe5ad3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_5f9713efa186f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fb971aeb8cf2.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/nigimul/logos_bible_software_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/donapedupazuvatugokedu.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/jizumutogo.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/jatuwozexelofexif.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/escape_room_the_game_jumanji_answers.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_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 5648 bytes
SHA-256: 0073997cebb1116035208291b43432a99612e7f8b928864924870afe927a3356
font_01_sfnt_off000105b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B4 11564 bytes
SHA-256: 50babd802830fd4987b1c391d4505e4c28cdcddc0b773256207097cea84df43f

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