Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e14505fb58a7410…

MALICIOUS

PDF

90.6 KB Created: 2021-07-01 15:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3536895e5b1687a19c326d92ffa8943e SHA-1: 4e805ec72b474f1ee016b5155ba94e951f13ca62 SHA-256: 0e14505fb58a741025ba82f58dfa8e989488c411f35972efcc15caf6eed98337
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest potential exploitation or redirection mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://compufoxmail.com/userfiles/file/wogobenawonimirenapola.pdf In PDF document text
    • http://accronline.com/userfiles/file/21029449354.pdfIn PDF document text
    • http://ewtch.com/upload/files/vozosepegovejik.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/54d44d3fdfc1064b7f1e1d2824e313bd/wibimatipazavumatet.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/41612380344.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/fujevuk.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/c8ec0c875653f0120ba0d0a5dcb94f1d/jejafazutuboreveb.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/52cd78b784b621febc1f39d681010aa1/69605842814.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd160a883a---nexikogutisenamonobosur.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c9baabb06ff---6257441538.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/30204850217.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/5a9fd65cde8d11135e2af441ced53d13/67734674072.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf172a9ec0e---lojipulajoxogumozegiguwin.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/1366q9h2v25q9tli2gggogkan0/zutow.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/wimedewovevufepineroso.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/87605625334.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba9a487b31---varezubusuxusedogani.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/4401395127.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818912bf90b---piwobuvobejalumu.pdfIn PDF document text
    • https://2acontractor.it/images/file/56124617897.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608736f9ae8c2---68952767508.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609411bcacdcf---2764340892.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/0547ed9adfa685ccc56477aba76e9f8e/2410433010.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/7300251057.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840f7782b59---zogit.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609843ef061be---52929469137.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=among+us+online+pcPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001013d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013D 17048 bytes
SHA-256: f850d9ba5fad1dc89fd8ef3f37d3380130f8f45c7dd0053588d9dc5c9433c71e
font_01_sfnt_off00012d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D94 10440 bytes
SHA-256: 77f20bda79151957aef3bcbdba496f88602d3a5a639cd9d1e5300c7e2201b640
font_02_sfnt_off00014539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14539 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1