Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2794ca1f64258d…

MALICIOUS

PDF

79.4 KB Created: 2021-04-01 07:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 62f8a1249aebe917eea770bd604cb9f3 SHA-1: 414957fc32d7f6a9fffd5b456f79bd5e20f36406 SHA-256: 6d2794ca1f64258d658560fa01c0e6b3023fdd3eaa64d31772808f59d1b594f6
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 by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV and ML classifiers also flagged the file as malicious. While no scripts were extracted, the embedded URLs are the primary indicators of malicious activity, likely directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://zajinet.ru/strik?utm_term=how+many+companies+are+in+the+us+stock+market PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365624/normal_60229f9cb64ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392209/normal_5fff5bd6ea2b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408170/normal_5fdc1a259645a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_6010fb00a3d0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fc5b63353e7d.pdfIn PDF document text
    • https://zamovolipizutuj.weebly.com/uploads/1/3/1/0/131070940/9724852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_6013a8d3444c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496571/normal_5fcbee8423bac.pdfIn PDF document text
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/385f931a.pdfIn PDF document text
    • https://xamukujivova.weebly.com/uploads/1/3/1/3/131384573/zisofujewazepu_dozazafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478415/normal_602d0557e4036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530868/normal_601ee6ae7f9b9.pdfIn PDF document text
    • https://nanagimub.weebly.com/uploads/1/3/4/6/134632235/wovinig.pdfIn PDF document text
    • https://fiwobezamarevev.weebly.com/uploads/1/3/2/7/132740324/1126568.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/dudujopixejikug/59642476449.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/14438146540.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/makatovenegu.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/checkbook_balance_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/35774707524.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/modo_de_produccion_feudalista_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/bittorrent_limit_speed.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/23452262687.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/walgreens_wrist_blood_pressure_monitor_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/acupuncture_points_for_knee_pain.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/lezogewujububebidopiduw.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/64200650116.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/82086301747.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/65809136597.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_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 5360 bytes
SHA-256: 869d1eaf58693a1af1b405a1dbda1c3a5abac378037658452ccd0f93d4b3de8c
font_01_sfnt_off00010abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABB 10964 bytes
SHA-256: 9e5bebeb4c7761db3ca0bcbadd13a9a5fe9c6969a8db0fd1f8291a3a5efaa393

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