Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b30c86b2bb31288…

MALICIOUS

PDF

90.3 KB Created: 2021-08-05 19:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b627bf1f14feff599904fceaafe4bd9 SHA-1: 412ced0aaa5565fb8bafe28caa71ff887ad9c206 SHA-256: 2b30c86b2bb3128874075ceefef3dceffe2b8e7635f7f6bf328c1716182228ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further supports a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://allytemp.ru/uplcv?utm_term=how+to+service+a+ford+ranger
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608068c225fb1---latuvizigepunigimifuf.pdf
    • http://aite-materials.com/upfiles/file/varimalejanaxepanaro.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40c7b95a19---61533518878.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f2181acf5---87265855262.pdf
    • http://www.bufolari.com/public/immagini/file/33006864459.pdf
    • https://music-group-store.com/upload/files/7459596508.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce7f66483e---36351742092.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce496c7ca0---jafemubeto.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749593c2022---65858279542.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6145c17dc8---41594637945.pdf
    • http://pillshop.ru/uimg/files/32611856078.pdf
    • http://win-sonic.com/kida2018/ck_imgs/files/83497729746.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/112gsdgrt90kck31g7d1g58kh2/57196210810.pdf
    • http://worthingtonpark101.com/userimages/95727146711.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735f49bf837---surigomaxulonijox.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/atnsro3o5niqvefhnipqjqmo53/6823761268.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ce862dd26f9---rojidakalitabu.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/7f5e135ef973f88fb9ed458023724661/legikapi.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/57ffbc1072160b7466f13009ab072f87/makixununilobumelimatigu.pdf
    • http://thewellmanteam.com/userfiles/files/17949537245.pdf
    • http://kaizenlife.com/ckfinder/userfiles/files/lujutidiwum.pdf
    • http://gift-founder.com/archive/upload/files/baretefabekemuxuzuzubiver.pdf
    • http://dachastyle.com/userfiles/file/50571766645.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0ef656a3854efeab7328b79451cedd61/5038270444.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/42ts5dkal61sb2r0k4oqnl1g02/76434093375.pdf
    • https://arichaindia.com/userfiles/file/nusukirabelo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdbd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBD 16792 bytes
font_01_sfnt_off000115d4.bin
82562cc433b217e90619a676b139bf8c0b9178aecfa55142fba4dc2308cef837
pdf-font-stream PDF embedded font (sfnt) at offset 0x115D4 10748 bytes
font_02_sfnt_off00012e80.bin
daf79f93ea4f11906cf594d3c30a5caf7b4ad31758c50d095c4651c7edc146c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E80 16800 bytes