Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d90a34d0e18719…

MALICIOUS

PDF

71.4 KB Created: 2020-11-19 04:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4f663eae8325e2b862108f5b3663d116 SHA-1: 1d3e2c31d05d65db901f1c0f27d8feaf7305503c SHA-256: c7d90a34d0e187190a73998f8a5e3027322687dd29da01ca91bbd9f22b714209
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'traffking.ru', which is likely used to deliver a secondary payload or conduct phishing. The document's content, though heavily obfuscated, suggests a lure related to an 'encyclopedia'. No scripts were extracted, but the presence of an external URI and the overall malicious detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/strik?utm_term=the+encyclopedia+of+demons+and+demon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452626/normal_5fad8f64e5d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_5f9f697c5374a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_5fab7ca1e2d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5f8c92383f53c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5f91578aad447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405907/normal_5fa24fd050dba.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/xefejevife/taxonoduwudomowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b87df2d6-dc7d-4279-b139-ee55d2f1a0ed/48769405346.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/online_shopping_advantages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21712e6-d0c3-428d-a8eb-f300373a73ce/nedaloxep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0390369-733c-47ad-ab8b-e8a7a40d1d91/acronis_disk_director_12._5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36863ed4-8200-4cd2-b2d6-df892c4cca5a/funovatozar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfa9bbe-8082-4d7d-9a0d-ba24b764878c/71222715330.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/samsung_ice_maker_service_bulletin.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_off0000daab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAB 5352 bytes
SHA-256: e9a42ddc08fea0f4ff788f4363ebd945fa65c684e0c7f7f8c6a497715259a1fe
font_01_sfnt_off0000eccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCC 10668 bytes
SHA-256: c9f53d864b79b092ddc929db782bbd44210814b424e82b67c139580c6f9c8873

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