Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a32ae2dda3ef3c…

MALICIOUS

PDF

87.2 KB Created: 2021-07-30 12:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 41a578a20036704235e25f80c6e8330e SHA-1: 480a1e5cf4d7b96b52f9fe86e40f5e021ec5cd66 SHA-256: b6a32ae2dda3ef3c658256c9b01e4907fe9556523b707d92184dcbbda38e9abf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting it is used to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign or malware distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://medvor.ru/uplcv?utm_term=how+do+i+activate+my+netspend+all+access+card PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lnmbg29gob443qq7j9r1vk0b10/fafawotiliwipet.pdfIn PDF document text
    • https://semagro-msw.ru/pics/images/file/1253650647.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ed13ae968e5f14b1114cfd546c144d9d/riguzagereposojik.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc99334f1a---vexixewugotalerixuf.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c8e010b19---87054753981.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/zujalikovezogusadiw.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/14012852032.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/799840347e840e22e032a7a8f221d83f/12517558122.pdfIn PDF document text
    • http://reinforcingourheritage.com/clients/0/08/0860c2a235168fe7e4a745c824023bdd/File/68946034589.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/zasedep.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/bevodukejokajox.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/lejujebaxasolesifi.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0327ed962---jujojesejamomajasidizo.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16070a4f9c1180---zatotikibezomunebizujumax.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/48099919184.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/jamafular.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/23pmh88jv9fhdfol7n6bn46ev9/61238870343.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/608307000.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/5fc2f3add8527fc85bd1a31cb83815a0/bodufewopukenev.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/238895e158c402932b21d73807b80e23/58453988613.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/53286177466.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/b1hlajai63ggfvs64rne2ko6ug/kapes.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_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 17968 bytes
SHA-256: 9423b256bd2dba05f2e513587c9356ef24c968395b4d1e93d28fccca2be936eb
font_01_sfnt_off00011caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAA 10932 bytes
SHA-256: 21e3aee5e9dd42ecbd96d4dfde2124ff03e6523b55d979f229abfa31fe659859
font_02_sfnt_off00013600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13600 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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