Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d2e3abc6ba255a…

MALICIOUS

PDF

80.7 KB Created: 2021-05-14 13:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 07319f31adcd4ccb05abc222826d4620 SHA-1: a6a56f7945a9af10bfaee6f0ceefac57f410a403 SHA-256: 44d2e3abc6ba255a07f04a573320fb578a1faf82143daf50fb5c2bbf6aea3a32
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic suggests the document's primary purpose is to redirect users to a large number of external PDF files, potentially for SEO manipulation or to host further malicious content. While no scripts were extracted, the embedded URLs and the nature of the link farm heuristic point towards a phishing or malicious redirection attack vector.

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://static.s123-cdn-static.com/uploads/4481825/normal_600217ebd0393.pdf In PDF document text
    • https://vonebofakakare.weebly.com/uploads/1/3/1/8/131856314/ef7d748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5fca59c4644cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446394/normal_5fcdcbd92df49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_60123392b3d64.pdfIn PDF document text
    • https://nezivubu.weebly.com/uploads/1/3/1/3/131384481/rubajimuwaruzefu.pdfIn PDF document text
    • https://berizezemimuto.weebly.com/uploads/1/3/2/6/132695806/sabagupewebev-tokiro-texevugugopumu-lejojuximarawuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411919/normal_5ff1fb1b2f054.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/dibapalug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427093/normal_603d3b0d419be.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
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dRGGkpkNhSI/wb?keyword=white%20led%20christmas%20tree%20lights%20amazonPDF link annotation
    • https://uploads.strikinglycdn.com/files/9e2ce0dd-e78f-412d-8af5-e1ef7a8e178f/belovami.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_c844b8bbd46c4bc0827c49e1846a7758.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajujiju/batman_the_killing_joke_full_movie_download_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c776ac11-109b-4eff-aa02-0cf89b90b35c/jovigolizibikutefadovuxad.pdfIn PDF document text
    • https://a1caaca2-2281-43ca-b2b5-e8dcf6f2a4ec.filesusr.com/ugd/c6e36d_df217fc23d394e218752fbc21b641993.pdf?index=trueIn PDF document text
    • https://a9d1d3ec-13fa-4b7e-abe1-abe2c2ba1301.filesusr.com/ugd/f83029_936ce897b257472e8e97d7b83f96c31d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/taiwan_tourist_visa_application_form_philippines.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_off0000f0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FA 5204 bytes
SHA-256: eaabc8ed2a07a5818c194386a8ec6aecae309cef9c2e7f4990d5288eec73d403
font_01_sfnt_off0001028b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028B 10824 bytes
SHA-256: a53aea1c9687e0f25e4820a35bc87f332450503250d3dc5740862a7940904eac
font_02_sfnt_off00012795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12795 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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