Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d319563002f624…

MALICIOUS

PDF

68.9 KB Created: 2020-12-23 07:16:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ca8e038743a0cc5cbbefe59e979024d2 SHA-1: e41b601528ed46382a3c1e336e9ebb097c00fffb SHA-256: 56d319563002f6244eda4b42e7cbad68b36ef5b3de8db0de8d48f5601548965d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links. One of the primary external links, 'https://traffine.ru/strik?utm_term=pixel+car+racing+mod+apk+android+1', suggests a lure for potentially unwanted software or phishing content. The PDF structure and the presence of embedded links indicate an attempt to direct the user to malicious external resources, likely for further exploitation or credential harvesting.

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://traffine.ru/strik?utm_term=pixel+car+racing+mod+apk+android+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5f8a499943c9f.pdfIn PDF document text
    • https://jorokepevi.weebly.com/uploads/1/3/4/6/134688072/juzitusazapun-jidogar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415524/normal_5f94b65676338.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/pivujuzobezo_mogisel_xolopofika.pdfIn PDF document text
    • https://pexififowuru.weebly.com/uploads/1/3/4/7/134714045/307b45.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/sezewu/lonoboz.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/68028425497.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/murugokidukojuzum.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/fofogegowagiwamenupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf2bc703-cb87-495b-a054-18e796aebe31/nordic_lodge_rhode_island_reviews.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115278ef7301f8b11bee7/t/5fc7255409f4d56e8f7f4987/1606886740806/sound_meter_noise_detector_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/internal_combustion_engine.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_off0000ce15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE15 5400 bytes
SHA-256: 36777c1c8d66760edce939f92d074c82786dd1b637682942c6375888c5d8d8d1
font_01_sfnt_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 11640 bytes
SHA-256: 380aece037fc8638481c0fe9abbe3b43884a12ac238360d8022550248312b0dc

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