Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed097ed2c821cd8…

MALICIOUS

PDF

72.3 KB Created: 2021-01-12 11:52:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 81f0ba6868634b2444c8d27718a07108 SHA-1: 71cee00f792624515e4023035efa1f57c36dc27c SHA-256: fed097ed2c821cd8021c0836145fa3585821e4b6163bd39639f68036c9be43fb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm heuristic. One of the primary external links, 'https://trafftec.ru/aws?utm_term=bullet+movie+songs', is suspicious and likely leads to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=bullet+movie+songs PDF link annotation
    • https://rapalavosifezo.weebly.com/uploads/1/3/4/8/134886177/kujij.pdfIn PDF document text
    • https://duvujisukodat.weebly.com/uploads/1/3/4/6/134674851/a00c0696.pdfIn PDF document text
    • https://nodimawajovuri.weebly.com/uploads/1/3/4/4/134431691/kudaporise.pdfIn PDF document text
    • https://megigoxifiwovom.weebly.com/uploads/1/3/0/7/130740625/gaded-tezenuzez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413702/normal_5fed381bf0ace.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/mewezekilafef/labetenunaxegizolanefenub.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/tedutud.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/can_you_add_images_to_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/quartz_job_scheduling_framework.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/20686452784.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/open_angle_glaucoma_nice_guidelines.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_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 4808 bytes
SHA-256: 7bd086a5728836d69f272ca7f232178eff1909c8f3cd5849e7f325400322dc62
font_01_sfnt_off0000ef62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 10944 bytes
SHA-256: 2e45009829f680784e6b3334035a7a51336ff953dcde286a20a79d6f8bcc3f08

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