Malicious PDF — malware analysis report

Static analysis result for SHA-256 febbd3ac2c8ec01b…

MALICIOUS

PDF

99.2 KB Created: 2021-10-13 10:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 144e654210cca879cf2d6f7c17f831ce SHA-1: f1dbf7e39f0e46381cc63c704829e52bbe1cbc48 SHA-256: febbd3ac2c8ec01b68f7a55014be9de3cd1771615891c0f8e2dc61d07740f607
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The high number of external URLs, many hosted on compromised WordPress sites or disposable domains, suggests a link farm designed to redirect users to phishing or malware download sites. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=fire+rescue+academy PDF link annotation
    • http://iwayman.com/uploadfiles/file/210913104329605740ddmonc.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/0b02c91d5f2d44e6823a6df874bd344c/zonixawi.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/75058314054.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/42941793569.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/81086877190.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/3a8ada5af5b6d6f4461f712e0fb1dfdd/pidojitofefiw.pdfIn PDF document text
    • http://tt-ural.su/admin/ckfinder/userfiles/files/pekorazupujusomesaxesati.pdfIn PDF document text
    • https://mbp.hastatis.com/mbp/upload/images/images/upload/ckfinder/63690368693.pdfIn PDF document text
    • https://ms1oke.com/contents/files/9051287894.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/46963270723.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///ditolekobalediken.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/vidujikin.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16155aa18cc784---23022056039.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/badowagokob.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/85929645964.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/kotoluzubegumutob.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/refotid.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090307510873499.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/susosavo.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/71293662649.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/38413763480.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/wiginog.pdfIn PDF document text
    • http://lse.hu/userfiles/file/zuxorusetirukuwadu.pdfIn PDF document text
    • http://esistore.com/userfiles/file/3247627268.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/nufed.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136e8cae39b3---xawakexobesesuvirotukiniw.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_off0001199c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199C 20488 bytes
SHA-256: 8cf5f81167f892f1d30d62fc91e2a91db9e9386ac95c93fbd2630473b5fe4c1e
font_01_sfnt_off00014f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F97 10352 bytes
SHA-256: 246553c01c8ae91f7c78045f24ce66e4624dfbeea56d3183f4c69b5e6631e60b
font_02_sfnt_off00016704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16704 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1