Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1639bcc9ea8f05…

MALICIOUS

PDF

87.0 KB Created: 2021-07-03 06:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c0e700046b354623d7d1ae94ca6db9db SHA-1: 7879f9017a13ccacbe555b8d188fe44b8515d359 SHA-256: ba1639bcc9ea8f05deb253c18921d8e398a623c6a09c7f4b6a4fe9d760f112ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely using a lure related to a 'style guide' to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=parisian+chic+a+style+guide+free+pdf PDF link annotation
    • http://shqinze.net/admin/upimg/file///tivedadizem.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/4c67608a49084e43f1e0b10aea2d1e5b/10101220529.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c95ece4cbfe287e7e31a7f4e37aead94/vuwatuvadez.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/30911341815.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fda2f09ca9---85815664455.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/25653514984.pdfIn PDF document text
    • http://bhs1966maui.com/clients/64750/File/bejonegezixaxuv.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/28934291735.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cfc7c3768---nodepuvuruku.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/13adb3d89e3f8ad68881a353c2e3bedd/zenusapibosugikowiba.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/jozokozovijivamuzakeluta.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c4a08f950---bojezerapi.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210629130856.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/95801796852.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12659569f6---mefov.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16070d3a0efe6f---22715672845.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/resulanizijare.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a02a24dd17c---4698367552.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/8a143e326da7875fce13b30a5428154a/zetip.pdfIn PDF document text
    • http://africareview.in/userfiles/file/37551781539.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160acf2bedb75a---jaxevadalegu.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/add835ee5a8c02871dfb4e89d1c37dc7/89883501381.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9b3241bc3---29245252399.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/314b826be88798551a2f04db189664ac/22059952782.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b0edc4018---18649668439.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/30469184341.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/55601211878.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/0fe9bc3043392fe7dec00bf15ef65748/15762127847.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_off0000ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 10992 bytes
SHA-256: baff9ac3a3823d5618ebe50a0c4f5d6a88ec55f67196dc23f2563f2338a6203e
font_01_sfnt_off000107a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A8 17480 bytes
SHA-256: 54613a9f1777325ccf12f27c9721c747273a6c4ef6daa341be06e3cec3afb187
font_02_sfnt_off0001347e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.