Malicious PDF — malware analysis report

Static analysis result for SHA-256 7892ee1b7c185129…

MALICIOUS

PDF

83.7 KB Created: 2021-06-29 16:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 247c57b9516e47be6e073196037e987d SHA-1: 0b1c51b726044e2084369e79e25bfac8c5e9450c SHA-256: 7892ee1b7c1851298eead932149dc8c87fe3bb5b1a5994d8e517a1746d426cfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The presence of multiple distinct hosts and the use of compromised CMS upload storage suggest a coordinated effort to distribute malicious content.

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://crysiq.ru/uplcv?utm_term=forming+esters+from+carboxylic+acids+and+alcohols PDF link annotation
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160776cb746a6c---vipupadutifiw.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/86641072246.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ef1045a08---5684290770.pdfIn PDF document text
    • https://isosklo.cz./uploads/77578379220.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/fcbcdd51658d8a6009963142c253cdf6/28485589399.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/2254465356.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/264df363e0abea05230e353a7177b511/85718628949.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/23404399102.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/31539135149.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/49246991245.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/hh8eb7s8ctln0n59759r28rb7n/89169439354.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b22ef64f9ee---21807341288.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090e026316fd---50399094270.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/skkg1nss0eoqqmj5ibde7u76s1/2144845032.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609857b594502---bevozujemurok.pdfIn PDF document text
    • http://macap.nl/app/webroot/files/userfiles/files/noden.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/ede4afee48f4d55216cf87142aa7b782/21442417929.pdfIn PDF document text
    • http://zae.me/datafiles/file/pudomilivinex.pdfIn PDF document text
    • https://digireg.nu/upload/pejojo.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/67f5455aa4b5a456cfd480f7c0b58a99/6545583731.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ulr391lobo2ek2rcbmtr9q4be1/gedogepomulitekudodosar.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/95421571385.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E9 11256 bytes
SHA-256: 15a80901f79e3593a5c7ac2508cdb690e7ef5316e4b9336ef2ce8daf22cdc9e9
font_01_sfnt_off0000fdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF0 16612 bytes
SHA-256: f403734b7d43ab1590e9554773af68b0d8266aba535695f82539629813578174
font_02_sfnt_off00012936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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