Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eed5077ce9a9af4…

MALICIOUS

PDF

78.1 KB Created: 2021-08-14 00:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c1ae4efe3d08f7e01aff7759cf933cbc SHA-1: c9a00d33a17e94b356a5a42666d7a7ebe132153a SHA-256: 2eed5077ce9a9af4fcdcb322b7fd22e93917bebcfb293fefa7bb1247b00abb47
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and link farm characteristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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=conditionals+0+1+2+exercises+pdf+perfect+english PDF link annotation
    • https://hojoairport.com/images/file/14127054456.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/92078415583.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ea14e49a940afcd7a305250d54a01c97/79065286258.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/gafenivajukilijekuf.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/12912642787.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a95949285---62863645167.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b88e4b9af1c---sisolawixozikuzelizimosur.pdfIn PDF document text
    • https://12shio1.com/contents//files/13267097724.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/e04061k16grf4imqr41cths1e1/82488680647.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e7db8775868d24465f8547b9e24c017c/xigoj.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/17406339198.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/51fd39764edd7e27468e67e5a1c88e79/16423751768.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/eba8d948c887257aaa058f7166aa2e7d/jejumirenedaxopi.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/redutis.pdfIn PDF document text
    • http://stpatricksreunion.org/clients/84553/File/xutidukibobigajevijog.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/suniwibosekejixuvanalivi.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210729_5B0E1D869F54BDAF.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/bfc24cf9a07aa357d73f3240d7e701a8/buwataluvepanarovage.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/c42b22d0f7e111029d50133229132b60/96507713067.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/45044374509.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/od2eka073ajn42rjn0bb9d7hv3/ximebupetaterabijoveli.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160889dd8a85e3---53372945865.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/36068512590.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/zakesiruwolewitala.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a2feb38437777723b9d6526acdba9c7c/84721956678.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_off0000cb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36E 11328 bytes
SHA-256: b52a8644d673c3a100c608b3301bd49910fd8526c1dd8ff1e3964baa4748a854
font_02_sfnt_off0000fdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEA 16368 bytes
SHA-256: 88e22a11a9db24fcfc9236f78eadbbaa6163abaa163462df1f0258fc03c0e415