Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a9097318ff1b48…

MALICIOUS

PDF

66.1 KB Created: 2020-12-04 13:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0410d1aa4a2f238dab1796df8cfefdb6 SHA-1: d5894415d8b0de394ebf684307ca74abbae10dde SHA-256: e0a9097318ff1b480ea7d564454aa58817753cdd4991834f1c2b16100024db21
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious URL that appears to be part of a link farm designed to attract traffic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=a-+level+chemistry+eileen+ramsden+pdf
    • https://fimekubolutad.weebly.com/uploads/1/3/4/5/134585071/sujod-rarowovifuwow-vinidakoneko-sepatami.pdf
    • https://josadezabo.weebly.com/uploads/1/3/4/4/134490641/4223829.pdf
    • https://nodimawajovuri.weebly.com/uploads/1/3/4/4/134431691/16a622.pdf
    • https://vubinejenifa.weebly.com/uploads/1/3/4/4/134444695/makise-jipoguwuleti-sezomuva.pdf
    • https://vitumiwoz.weebly.com/uploads/1/3/4/6/134697216/vosetejuxorukadixif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2ad52331-39f7-4223-b139-90cac9b9646d/noxogupe.pdf
    • https://static1.squarespace.com/static/5fc294961452f90b7fefeff3/t/5fc5781e6457125654f63656/1606776862969/how_far_is_200_meters_in_blocks.pdf
    • https://uploads.strikinglycdn.com/files/9c2e00cd-de3f-4db5-9080-3345a246ca5b/regions_in_brazil.pdf
    • https://static1.squarespace.com/static/5fc2c1e18ef7301f8b1ccf77/t/5fc695f4cb3e0f577136f135/1606850036704/fewejenegem.pdf
    • https://static1.squarespace.com/static/5fc1303a2cf09257bd6de59a/t/5fc923fd7572a559743c078d/1607017471234/borofor.pdf
    • https://uploads.strikinglycdn.com/files/73d7fb20-bbbc-4c59-a64f-704c335487d0/vovokiwawifiweruwawuwi.pdf
    • https://static1.squarespace.com/static/5fc5d46edf132613bbdf5b61/t/5fc6bf459dfc2a404507e633/1606860614143/81329220799.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0315cc750a3b5a070394/1606222621553/charlotte_mecklenburg_school_calendar_2015.pdf
    • https://s3.amazonaws.com/juzinaramip/body_parts_of_animals_worksheets_for_grade_1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5fe.bin
252b09065ac4afea956b22066d3266e961c584e2b71b8e79cb86946f30642867		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FE 5576 bytes
font_01_sfnt_off0000d8e0.bin
da94cbbee55f504981018cff7dcb3663d9ff1f70e1f6b4bf082d9ee12435a9b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E0 10384 bytes

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