Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f01deb0e9b9ae2a…

MALICIOUS

PDF

84.2 KB Created: 2021-09-05 04:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 68c27d1c1f6720bd549e74f1fadb60b4 SHA-1: 8a5cdaca82205f6f695ebef22f1b8785612f13c3 SHA-256: 2f01deb0e9b9ae2a4e245f1bfe738b42fa37e32f4d23b2857bf97eaf5fb49bf3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. This behavior is characteristic of a link farm designed to distribute malicious content or phish for user credentials. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/ba474d9fe015a3d55cfad3c321464ce7/9297873662.pdf In PDF document text
    • https://ph2020.org/FCKeditor/file/35414942019.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/3caffe318ce7ebababd353c4c249f80b/69580186561.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c687855b722---43484882401.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/5ohec0bp6ulq6uq8cn38ge2n51/76459302492.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/e63c112418e81357b28922391d89299a/jiborujidupotupitatu.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/betive.pdfIn PDF document text
    • http://cuatudongsaigon.vn/uploads/files/pigisutogenevotega.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0916984c7---begimidenavipatuxomew.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dq25o8l4qsmhi4uj25f0n12ma2/nusatesulelug.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/81435b4ddf6c5d7295c9055924067ca9/43433412168.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/15019552559.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/ziribegexijoro.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/ae47624f17f93de9315d9b9c5231540a/78718486559.pdfIn PDF document text
    • http://advicetao.eu/pictures/file/29004636638.pdfIn PDF document text
    • http://terminsk.by/pics/files/56119318387.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/88222505539.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a940d414d9---tisonulaxibebofiguranunex.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210806105010.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8ffe80f0d28f7cc0a4dc063b1d2fdade/xebonifexukab.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/mubamekivo.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/bomupunubalif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=simple+present+tense+of+the+verb+worksheets+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE040 19100 bytes
SHA-256: dd8cafe87652de3e8ed71b211a74b22908132a685bcfd5031f755f827b849d5b
font_01_sfnt_off0001118e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118E 11060 bytes
SHA-256: e72d763dba60232f0e0b9a75b6bdb9cefa9fe8a170d37b939baab9f23bb8be32
font_02_sfnt_off00012adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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