Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c1d03a59fa02f2…

MALICIOUS

PDF

67.2 KB Created: 2020-11-09 20:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4f8f40e962f9d60ef52b42d0d9198f08 SHA-1: aa4c13302293701a3581ab2de7cc8cba37121415 SHA-256: d6c1d03a59fa02f2c27e2ebfbb2fc4857031c3e6c3c477c9425bf69f16e9b0b2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and Weebly domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and URI firings point towards an attempt to redirect users to malicious content or phishing pages.

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://traffine.ru/123?keyword=imls+paragon+login PDF link annotation
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/bb778.pdfIn PDF document text
    • https://lizoduloto.weebly.com/uploads/1/3/4/7/134701777/peruve.pdfIn PDF document text
    • https://nonuvatemex.weebly.com/uploads/1/3/4/4/134443968/8719949.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/99dd0.pdfIn PDF document text
    • https://mavegisokelu.weebly.com/uploads/1/3/4/1/134131346/fafij.pdfIn PDF document text
    • https://titenukom.weebly.com/uploads/1/3/4/5/134523185/2690293.pdfIn PDF document text
    • https://biduvokiket.weebly.com/uploads/1/3/4/3/134367510/2186457c2840a3.pdfIn PDF document text
    • https://imls.paragonrelsIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takurugilij/74872411774.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/managing_oneself_peter_drucker_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/dogagusijudupu.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/wamif.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/63850422778.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/napavasifuxibawukodevefaj.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/catholic_catechism.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/pebodejujedalitovabonuva.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/jansport_digital_student_backpack_rab_sylvia_js00t69d0be.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/buddha_teas_jobs.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_off0000c88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88D 5076 bytes
SHA-256: 35507c85cc76dfc056d70495f33a446424372bc333d7d5c1aa700e332af2a90d
font_01_sfnt_off0000d9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 11364 bytes
SHA-256: d7614cab9d2a5ce6f5abec4c6107990d99cc86204c87c4f8ee2bda5d4d246175

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