Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcde0f5fc2e2f385…

MALICIOUS

PDF

92.5 KB Created: 2021-07-05 15:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d0b8b3d6fdccccfd7f8a814552fb3542 SHA-1: 9ea36faf446deb07771aedb0399862f3258beb7f SHA-256: bcde0f5fc2e2f38583736d93ce960f49a3867dcfb29c25e4e226f174d35d6c7d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm with numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting an attempt to direct users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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 http://consulcongress.it/uploads/assets/file/zabose.pdf In PDF document text
    • http://nomaquito-travel.com/editor-images/ninuponogodijibo.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/44mur35p3vju8gd06upfn3sm0i/11675098503.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098786c36031---zamedipiwolaxuwanaxut.pdfIn PDF document text
    • http://runo34.ru/attachments/file/446560436.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/41978273326.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/674d47178022847a3135b2a3c1ec7a1b/86069445334.pdfIn PDF document text
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/87ddb0baea6e8c986674047fea93a025/5805994142.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021060708152627.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11235a85df---malusaleloxaweze.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607033d4bab69---38807288130.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dedb791ebc---zujotogifitexafuwif.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/93058342483.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5bb46ea55---rojuxamifirifa.pdfIn PDF document text
    • http://wamer.org/userfiles/file/31016886838.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160727f418d2ef---94897260925.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/49hpfqhp37c0e8t6b6tt7kjtv3/zosiseferijozip.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/b0a199499701b1f37e189a8bdb23f665/vizexavufozuvesaxibavuv.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/27286492216.pdfIn PDF document text
    • http://climtech.com/files/files/gumeginalobodijaro.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/ivfas8uf365aq8jvht80n5o2u1/88128638441.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/koduripizakabep.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/refokizuni.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/85137075838.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/bobidafemexitenenana.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078981cac18d---90696688445.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=need+for+speed+most+wanted+download+for+windows+7+32+bitPDF 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_off0000ead7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD7 17828 bytes
SHA-256: 5e1de2f164b073490f54bfbc1ae1b7daf5e6eadb60b215e54b7dffcccaddec8b
font_01_sfnt_off000119b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CA 11204 bytes
SHA-256: 1ccf302a142c8a3274dd01aa96d4d9c917b4dc4a00d5f01a0f176793abbc9b38
font_03_sfnt_off00014bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF2 16252 bytes
SHA-256: d66bf48e304c78f6080084e0c9704384de85738853ce87f784528b0e0784b990

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