Malicious PDF — malware analysis report

Static analysis result for SHA-256 79514565b786b69c…

MALICIOUS

PDF

75.4 KB Created: 2020-12-19 02:14:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ea04248b31ba4af093b185fd94c12482 SHA-1: d0e7cf35a0e7cfdd8bf4a98d0fb757fd18bf7da5 SHA-256: 79514565b786b69cf1861da6aee91c18cb08e4c5054260f0d3f2b1c1536fae1e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this as a phishing or malicious PDF. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=absalom+and+achitophel+theme+pdf PDF link annotation
    • https://venakadu.weebly.com/uploads/1/3/4/7/134729608/gefuxipa-gekowumowi-feper.pdfIn PDF document text
    • https://jowovodepavilim.weebly.com/uploads/1/3/4/6/134651336/7561964.pdfIn PDF document text
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/6d0c581.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/e0df06f79e07.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/bb427ecff126227.pdfIn PDF document text
    • https://poraduke.weebly.com/uploads/1/3/4/3/134385775/xutuziwu-xewenumekezol.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/tadovu/gotozogofexigaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/tower_defense_zone_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446fa390-d6f4-4947-8366-0ebbcb2af0a7/3395824435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/901b133b-b1b2-4c6e-898d-17f4b16fb35a/89354361565.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/domoberaluzubiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c74b41e9-0797-423c-b5bb-2bb63b54df9b/navy_nec_9700.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/pusovomudegu.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_off0000e9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 5428 bytes
SHA-256: cd937bd9bb91cf1821a7f3600a95e2b142f39bb580829b080dcbc29f427d575e
font_01_sfnt_off0000fc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC01 10780 bytes
SHA-256: 526048d41d52e82d1ffeeb1acf19036556b25692dc845d593c1bd09bed2d98c7

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