Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1274b001cd33949…

MALICIOUS

PDF

87.1 KB Created: 2021-08-14 10:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4d041c2efd537e783d5ef66f31a9a787 SHA-1: e46fe0a6d5455af19df0f31d755cf8125fafe2a2 SHA-256: c1274b001cd339499dcede3e1139d98011fe9a26f528b0c81651f566c53c0105
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://drafthe.ru/uplcv?utm_term=warning+siren+sound+effect+free+download PDF link annotation
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abe6fd730cc---51976146768.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/98993357846.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/kewakakuzire.pdfIn PDF document text
    • http://fruitofthespiritcatering.com/clients/9/9e/9e5e3efd27976f294ade36eaf76108d7/File/96434799340.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/sorisawilasebavomunuf.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/12621512054.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d81b46570a5---xiratabajesalizexe.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/8a99048bf251221c27edbdc46d5b4748/zimivuvanev.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/0036c33fd6f1a938383f4569e9f09249/82706797730.pdfIn PDF document text
    • https://btegypt.com/file/69089611869.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/29ba705f149161effd9406053a3ee8de/83892943671.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/80a4324abdd2232744818d32ae50de3e/sevodevamefo.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/42949001530.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/bimalep.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/39148659466.pdfIn PDF document text
    • http://klinok-saintp.ru/files/jisizajotoz.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6682ef0515---tojosibuliwe.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/df388b3518cefc0f9803a57aebfcffb8/77003343512.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160739fef7ad02---komuxeni.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/7d96li753uhrm7vo4ajtqru9u7/wodif.pdfIn PDF document text
    • http://schokobrunnen.com/idata/kirunemeguxomozugir.pdfIn PDF document text
    • https://grancom.by/upload/docs/vigiwixuvedoxejofaliku.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161095467b6249---27898179333.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/wanatig.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://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_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10867 10832 bytes
SHA-256: 3fc24f4513628791560b5ee225b978c16e4a40061b068d877c90f064a3c72dd7
font_02_sfnt_off0001215d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215D 17092 bytes
SHA-256: 49f29994d4f624cfad3f65ab62132a275c32ca3eea6f509747994f915ca71544