Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8780f97f637ecca…

MALICIOUS

PDF

76.2 KB Created: 2020-12-16 22:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1f4c881dd89ef3bbfd5e120abba71b7e SHA-1: 92832b9918ae3a665542314ddce5b5373fb54b7c SHA-256: d8780f97f637eccaa4ed35148197ee17802d6c5aa30626adc70293ced2ab90b9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=skyrim+a+daedra%2527s+best+friend+lost+dog PDF link annotation
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/nogogipokudi-nedinoma-zegugujaba.pdfIn PDF document text
    • https://jelamiwigu.weebly.com/uploads/1/3/1/3/131382248/ffd5a4c2d6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0187eb25-1866-4b38-843c-0ffb4e6e820a/shurflo_2088_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f727f3-6470-40c6-b82d-fd427f5fcade/kuzokaxunokanesitolulu.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/jupewifijijon.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/87543879816.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294ce7848ba205d234ec5/t/5fcdce03662d5e24e0c36d4a/1607323139393/11107942937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4973b708-6fd1-49e6-87a3-1725481d602e/severoduzodoxozurapam.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/du_booster_apk_free_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e0bff2-f341-4d63-8e72-7ba39dae9fd3/lotowutonisusalal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1268247-ccc0-4085-95da-275e9a0d5b7f/factorial_anova_vs_manova.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_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 5672 bytes
SHA-256: 064527233ba60fee671707c310e109d60e5ce76ac77ce1b3de690e462c319971
font_01_sfnt_off0000fccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCF 11884 bytes
SHA-256: 45e1df4b858b59dc65c7de353b07572a6d3b48d98998ab02a8658ca0ddee10e8

Open this report in the interactive analyzer, or submit your own file for analysis.