Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3024ab079b2d91…

MALICIOUS

PDF

86.2 KB Created: 2020-11-20 15:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3474673b4dd02df3487454f64b1f4f5d SHA-1: 153ea2a90df1615652dbd1793bb1550815a33618 SHA-256: cd3024ab079b2d91d3ec99592c97580515fb6dbcac06fe3bd11374d46697bb94
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a heuristic firing for a link farm, indicating it is designed to host numerous external links. One of these links, 'https://traffset.ru/123?utm_term=wreck+it+ralph+bad+guy+speech', is suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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://traffset.ru/123?utm_term=wreck+it+ralph+bad+guy+speech PDF link annotation
    • https://limikasideg.weebly.com/uploads/1/3/4/4/134446439/sopinutuno_dazowomoget_sajalitakida_newixaxarogiwof.pdfIn PDF document text
    • https://lilikisewusufod.weebly.com/uploads/1/3/2/6/132682662/d780162fc025.pdfIn PDF document text
    • https://bimidupixujeg.weebly.com/uploads/1/3/4/3/134319160/4e3a1d6d61.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/97e989b5-1faf-47ec-a53e-d3cb64ddead1/62580185196.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/datuvisu.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/96132487462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038c01b4-d2d1-4465-b3ac-686ed6dfb4f6/36383995432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3613791a-1e34-4e29-b04b-0193409a6e44/making_your_case_for_christ_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/68132956183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19299c88-ba6b-4f08-b2de-5203465ae152/30182309334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c953e77f-596e-4c26-a413-ba9944b01aab/kuniji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76cade68-73b4-4d59-9882-77dbd8f88819/66122286184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6baa24-c974-490e-aead-5368499e2440/bubavener.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E2 5320 bytes
SHA-256: 0d3666290d8f9e9a26012eb84debfb494e0aedfbb18b52335015eba6ec62c37b
font_01_sfnt_off0001190e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190E 10792 bytes
SHA-256: 48edaa087d7892d7ba94f39728f5047b208db5cc41448d0ca289eca07ac5874b
font_02_sfnt_off00013dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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