Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddc1cf2edc16c40…

MALICIOUS

PDF

97.7 KB Created: 2021-06-29 00:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fd55e87fc61bc2300e60196ddb4c8f3e SHA-1: cd49beea89f6879a7c86e22e82ad98e56dc1cfc3 SHA-256: 2ddc1cf2edc16c40457c3e126cad23be6638f3ac6b3c09d5724cd2d781bc2a9f
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely intended to redirect users to phishing pages or download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://queure.ru/uplcv?utm_term=white+rice+and+eggs PDF link annotation
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/52ee4bb8a7e4aba0961cb62f9d23da54/33780354225.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/87bc36467b50ea85270f8cff978914cd/70559951243.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/0b2f74394d1d3b1cf1c0acbbd634120d/zatex.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/1428367851347ba8c2ccbafad4c304b3/tobimo.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160d8b89e1e845---64782344158.pdfIn PDF document text
    • http://helderlive.nl/ckfinder/userfiles/files/79084294245.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/relikajekedidef.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/wukafonujepubufe.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/7956066402.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609176c808a70---43103200127.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3138c8282---25408732125.pdfIn PDF document text
    • http://royalgroup.at/tmp/45773676235.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7tm9falrp8h90qgef4b93f1hp3/70698536765.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/f726de6debecacb49dadc901734f45a4/toxus.pdfIn PDF document text
    • https://icbacademy.com/upload/files/98418074566.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210620121612.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/funododamanof.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8f9f1bfdc---jaxorawujirelabef.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/sifonuz.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/eaa2c9ae1575a93cd11b86caea16ff87/72584369241.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7ec4baf2f7---xawojiv.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/lshje2in44efsm7o28dhvec202/50553755791.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160812d99326a1---bawepok.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-15/20210515135550692053.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/fasozavomufatomovuja.pdfIn PDF document text
    • https://blugarden.eu/file/jupobenesuzajizuwitu.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_off00011bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC0 10476 bytes
SHA-256: d0a2c6b75b8e70a6dfe088b95649e295ffd5e02301ec9601ebd4cdfb01a290dd
font_01_sfnt_off00013350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13350 17380 bytes
SHA-256: 41c652bcb59c44a1a3d996a42ef1ba3ffd600a0bb763fce8375188feb512ca35
font_02_sfnt_off00015fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1