Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1874848f30fed7…

MALICIOUS

PDF

66.3 KB Created: 2021-01-04 18:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 26a16a543e02b7cc603e4e47d340c1ca SHA-1: 5f0b063749885791ded1e04dc9b2513a01a916b3 SHA-256: 5e1874848f30fed747892ebd9a6bc88db7a84e6749a875f7b400de49f15bca40
156 Risk Score

Malware Insights

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

The PDF file, identified as malicious by ClamAV and an ML classifier, contains numerous external links, a technique often used in phishing or SEO spam campaigns. The presence of a link farm heuristic suggests an attempt to manipulate search engine results or redirect users to potentially harmful sites. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=iot+project+report+ppt PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489429/normal_5fc3f0a87c165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410952/normal_5f9779b4eae8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_5fa67bf4ec71c.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/7665092.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/bwmhfaC/jobikatobuvi.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/39adc17f-0dd8-4b0e-bd78-ae095ee4ee84/jodipexigosakaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/libufawejedabinapij.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/77169293829.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/98981515673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3169a3cb-1169-4f47-9ca8-9e2b05d8788c/7_for_all_mankind_mens_jeans_outlet.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/cdc_varicella_vis_sheet.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_off0000c9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D8 4520 bytes
SHA-256: 89edc8df40a4c8d2622bf595f3c910cc7c49a284727b00a808072afee8a63134
font_01_sfnt_off0000d94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 10376 bytes
SHA-256: fd5d31f9e23a80ebdd24a1eb9d7923c36e3ee786e8d4f67495e9f6b37e71a7d9

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