Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdeab7be2d7fcd6d…

MALICIOUS

PDF

123.8 KB Created: 2020-11-25 23:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f1362e6958fb3f0ff024d05fcc2a86a2 SHA-1: e073e97e2bf9407bdc9a764125d16cc8195f426c SHA-256: cdeab7be2d7fcd6d50d99bd259784e893f6086b331aebc943e277c440bc66664
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent URL pointing to 'traffnew.ru', suggesting a phishing or link-farming attack. The PDF structure and embedded links are consistent with attempts to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/123?utm_term=parejas+de+rebelde+way+en+la+serie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5fa4b97cbe713.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/pevuzew.pdfIn PDF document text
    • https://ruwufinojib.weebly.com/uploads/1/3/4/6/134643146/xibojogewexa-rakuwiwib-rowev.pdfIn PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/wosiluzomopeso-bakepojogetina.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4a76a24f-a172-4937-ab38-3c96ecc218a7/gixuvotilezigarisake.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/backlink_building_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e18dd5-0206-4196-a3a6-9fa4f9de8e15/robavodolujemigu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/66228163031.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/exercise_for_ankylosing_spondylitis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d6f4e30-14b7-40e2-bd2d-083e0de89dc2/1979_trans_am_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/armed_heist_android_gameplay.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B20 4828 bytes
SHA-256: 1127a9d4faf9d21e4b7dc604ba83a0088c91951c11a12127cf845b14cf53aa81
font_01_sfnt_off00018b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B8D 15708 bytes
SHA-256: c42459fb9402bcfd494815d35fc7b92da32a6dd46ae7ba8c3aa9b6b7e5e0a306
font_02_sfnt_off0001bad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAD6 17072 bytes
SHA-256: 8b83206d33285b3843ac096df113a85eff5d500932d9a02036c36d7d7ec565f7
font_03_sfnt_off0001d3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3AD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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