Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0ced3fbd58deb4…

MALICIOUS

PDF

83.2 KB Created: 2021-09-05 08:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a16594cc86f576c3dc1852483b9a41db SHA-1: d98db9fe44781deb9126b0a34598776fed3bbc5d SHA-256: df0ced3fbd58deb4d4790d5feebcdd86d18e599871ef85f58fd0882feb2d6ffc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The presence of 'utm_term=complete+denture+steps+pdf' in one URL indicates a potential lure for users searching for specific information, which is then redirected to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/r3582naei4mh3qg8abma3hstgt/47905012333.pdf In PDF document text
    • http://wjcopy.com/upload/files/luvawo.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/43675273443.pdfIn PDF document text
    • http://wohingltd.com/userfiles/bazisesefubip.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ssmb9i09fa82omc4781t0car77/lokozigabiraxira.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/lro2bc1hpoedombda34q29ij97/modujopuv.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb66241275---nokobijugoxujokewojo.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/45708858448.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/l16ibu4oeskot8pjvp9t6991t4/55613833110.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/19554625812.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/21537221416.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210904011548.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106240215147640.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1611d23fa894c8---85993020281.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9096cb159---7349233099.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/34348329971.pdfIn PDF document text
    • https://limmaginebistrot.com/file/kopujazekalesuwote.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fed3598273---92011675715.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/49110190602.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/sajutokotoruluguwolevim.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/65887175895.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4389479d6e---93968740073.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=complete+denture+steps+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_off0000e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 10536 bytes
SHA-256: 956695a6bf66bfab6cb5cc175173ab130a74be71d9ef249629896dd444afbe98
font_01_sfnt_off0000f813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF813 18452 bytes
SHA-256: 12d70c12d4eab207294bc24934396d6a7c70708b5c106fc757f8cfa1b28b6a38
font_02_sfnt_off000127b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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