Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca0de2b8830fde9…

MALICIOUS

PDF

88.5 KB Created: 2021-07-31 11:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fe7ddf8bc2f82cd72c30bba7de5c180c SHA-1: aefa1dd0294434b8f2c08a2352fafa414229aeda SHA-256: 6ca0de2b8830fde9f7e4ba0ec1b2499ea306a1ebb9fb854ab360812e3c4d0547
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and link farms, suggesting an attempt to redirect users to malicious sites. The presence of these links and the overall detection score strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/4c3cadeb71ffad35e04747f5b4ec8700/sexesalemefe.pdf In PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/3a60472ab4dc8c79d5e8cab2444ccd64/robazazurumugudaxijesuxi.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/47266776954.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842359e8220---wawedesadovanixebunipid.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/d5e3f8fcac48e45333d99da6c19e1b4f/11142760462.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/23794035997.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/45034066271.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ee0d6082a12cc4ae1d7a0a0dfef44881/nopevikikixalus.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/c1648c20daf1b895d83e8a80a5846059/gopawubuxojobo.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/vqaacgvkskqcbmphho1jtcs275/xugoz.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/gafedud.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/tlib9q46ndukkffi3o12tggkli/97845163943.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/e36c5d0ad66fef67ce213e48d3f2ae21/berizefifukenas.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/43149054498.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210605_3B84B505E79556C2.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d38a3f906c7---29424263400.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/gobizivuvefejejufejo.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092481c58ef2---rodapijasofeviminegedat.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/55154763164.pdfIn PDF document text
    • http://llux.vn/uploads/files/latonawesukubovupo.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/c9beb9aa7e1cec2e2a7fe0dbbc48fa1b/pudajalamuxuzuxoxa.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/69lj13aiprj3v6c14q2vtsobfg/480433900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=shrimad+bhagwat+geeta+yatharoop+in+hindi+pdf+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE22 16980 bytes
SHA-256: 828a70bda57c0b97377226ea245ad96d4c52820646cdac2a2eb8c33677ed98c6
font_01_sfnt_off00010ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 11192 bytes
SHA-256: cf34bd6ca75b39dc61b988e19ba75fabddf0542fce9d35b3f3bc79fffb70800d
font_02_sfnt_off00012451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12451 16588 bytes
SHA-256: 1513cb84dd87814d35ff0c3299b1b9232923a5e09bf6297cf0bd7b3a9d5f350b
font_03_sfnt_off00013ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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