Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a922b54f548971…

MALICIOUS

PDF

90.1 KB Created: 2021-08-04 15:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 12d79ec7d6e930530ed246b6e12ee3d8 SHA-1: 6501c85d3f73107555334e5d4bce08f640d292f5 SHA-256: 02a922b54f548971bff31f6e8ad0b6f6ed1037c76f8618453ad69b62d5e97784
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external URLs, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://irlanc.ru/uplcv?utm_term=bosquejos+biblicos+para+predicar+en+santa+cena PDF link annotation
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082ddb0c87e1---bijuwalurovilupodoxu.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/62504d7361d6960075b06144c0888013/87558670890.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/sutijemefokagog.pdfIn PDF document text
    • http://waukeganeast1980.com/clients/877304/File/ruvanoxixafovuvawumamasak.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096a50ceecc1---rujivezuwobesunezakom.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/16586488682.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/tokawajebupamokonas.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/fsupamqm5drvik9rtuofgg33ng/78356174493.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/78151090843.pdfIn PDF document text
    • http://anupbolivia.com/images/files/memabubejepikirunigamok.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/a209f7456aadde8bc09d2f48080be383/78635637576.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/u26bqlps3pj2jhorlaqe52km4i/xonepubojamo.pdfIn PDF document text
    • http://accessoriesunlimitedinc.net/catalog/file/zubukuj.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/pofijiwokamopugalidus.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/sotuxizugimowuzar.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/tifizojebuwow.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/6llc0fj0hgp1l89rl4jo11acaho9133a/91488155144.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d0076e49---33514518141.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8be5fda7---39436336805.pdfIn PDF document text
    • http://charivne.info/images/file/duribaromuropatoliteg.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/3463b7ad9aa2bab2f30e472931f3d2f0/walebokozonaraful.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/10e95ecff25b4a91ff9583006b9c3e42/fajafe.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_off0000f8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C2 11076 bytes
SHA-256: d84f1bd3aa0c95a116aaf9b54ed1d3f1635feead7bf6c39d316d9fef04e8bc6b
font_02_sfnt_off00012a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A45 17952 bytes
SHA-256: 4c0c9029ed61062ded4b58e26a989068b4a023816bd6447d4988f2620eca3d9a

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