Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19a9d028742fc49…

MALICIOUS

PDF

79.2 KB Created: 2021-05-25 08:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f34d1549a67d3a41bf23d73ee33e2e9f SHA-1: 4184f9e983e2363f2f932b10dadee6d33bbb4e83 SHA-256: e19a9d028742fc49efd0ed4e981caf284b8a64fe50733ac2840fa7d25700e1d5
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used in SEO link farms and phishing campaigns to direct users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/strik?utm_term=cat+lift+truck+serial+number+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463808/normal_5fcafad52be5c.pdfIn PDF document text
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/luzataforukego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_600a4f168cbe1.pdfIn PDF document text
    • https://xutorobufazam.weebly.com/uploads/1/3/5/3/135345650/7543041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368969/normal_5ff9b692db58c.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/nerujizopifizoredew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_604fb6ca41c8d.pdfIn PDF document text
    • https://vakexojukesazi.weebly.com/uploads/1/3/0/9/130969985/6fc7f15d3b.pdfIn PDF document text
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/fatizewuvajosiv-wunajixotaferu.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/memobofilenabon/beginners_guide_to_social_media_platforms.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/how_to_reset_charter_cable_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764ed458-b1fe-4de6-835b-68fa14d8d862/bokazaxezorawi.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/circle_equation_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/steinway_s_baby_grand_piano_price.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/41079905936.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/63761715528.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/vasumawufobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de2f9fa-4d83-451d-80a0-effd7ba62830/23385897979.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/26420967780.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/gumepineborifelojugup.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_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 5452 bytes
SHA-256: fda11f6db3132baa32d4149e030aa5aa4ad0390ff6de3dc0ce2196c6e6906208
font_01_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 10792 bytes
SHA-256: 5eeda5ed63a71e015724ef65d87c334a371ca3200e9687d2c752c7fd7d0c2efb

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