Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d1c1209bcd2dab…

MALICIOUS

PDF

78.7 KB Created: 2021-09-01 16:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ea8eb240f4e4092cd822f8313e3afc04 SHA-1: b4d79f04425b4abe98071188a6abb6a00aaa005f SHA-256: 01d1c1209bcd2dab38265e11afe258265e6be945803f4086206703a958c47e17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on compromised websites. The presence of multiple links on disposable hosting and the use of UTM parameters suggest a potential SEO manipulation or content distribution scheme. The file's structure and the nature of the embedded links indicate it's likely part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829fc5404d0---64658514655.pdf In PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088bc3fba1c3---30218288498.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/34102470263.pdfIn PDF document text
    • http://afra24.com/basefile/afra24/files/biriravamojuferebenuzo.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/93027023137.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/pomozukej.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/vikedutupobuze.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/fosopiwasusotapusaf.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/90339964563.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607937cadbbfb---61643596924.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/felet.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/datase.pdfIn PDF document text
    • http://herium.net/FileData/ckfinder/files/20210719_EBCF141055404967.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/83944852510.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/niwugobovalidapozizegifun.pdfIn PDF document text
    • http://cfacgroup.com/uploads/FCK_files/file/vadebeponirefewagozopuret.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/80451764634.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/26029922201.pdfIn PDF document text
    • https://bczenekar.hu/files/file/buladedu.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818c898d97e---finevol.pdfIn PDF document text
    • http://0930actress.com/files/files/tedufenidezokelusonisisoz.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/senumexora.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070e91639fb9---12514943256.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/bjuq5p7vroiph13rnks2m8e0hv/19923062942.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f01eb787cb---repatilugafuxam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=320+nm+to+ft+lbsPDF 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_off0000cd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD31 18552 bytes
SHA-256: 9ba21114a6db6465b67c6bd81645daa25e2515dd7a95f05a1c1d22383465d31a
font_01_sfnt_off0000fdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11612 10344 bytes
SHA-256: e071e00a7f031bf9b5ca7993ed5ce4995cc1baf11909c34d13b084ade5fcdb63

Open this report in the interactive analyzer, or submit your own file for analysis.