Malicious PDF — malware analysis report

Static analysis result for SHA-256 30112f100e05b659…

MALICIOUS

PDF

88.0 KB Created: 2021-08-13 23:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41af528efdf695e28c0f2d214b1df8c6 SHA-1: 9d1ff39917ac01b07e8bedf06420054893d75476 SHA-256: 30112f100e05b65927e853822211f683823b4c65a08b1a73f63277550bcf9bbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external URIs and links to compromised CMS uploads, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or further malware. The document body is heavily obfuscated and unreadable, providing no direct content-based clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706680355e1---jakumuvevozujakawojezufiw.pdf
    • http://robwalker.net/fckupload/file/tafudujetijilavi.pdf
    • https://radio-aurea.eu/files/file/92810358736.pdf
    • http://valdhans.cz/userfiles/file/88338781544.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757123aff93---samerisedowiviforol.pdf
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/66388413835.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e62dbab252---90864531355.pdf
    • http://conhantaoankhanh.com/webroot/img/files/84660930571.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160962f96e64e6---48429630918.pdf
    • https://strategieb2b.com/userfiles/file/24553569775.pdf
    • http://anhuicrew.com/upload_fck/file/2021-4-30/20210430235604232708.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6b0652dbd---vivetudikozirupupemite.pdf
    • https://alharithiforcameras.com/ckfinder/userfiles/files/3196397088.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e6b13329a---59733769730.pdf
    • https://alternativecarrepair.com/userfiles/file/15744828571.pdf
    • http://smclassof57.org/clients/34860/File/87890975176.pdf
    • http://poslovniimenik.net/firme_data/files/sonipadapatugum.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3ff89d193809963dca7de170b10d1616/87463358818.pdf
    • http://work4shop.cz/userfiles/file/togodivurawuvad.pdf
    • http://geredekombiservisi.com/userfiles/file/butadijevovukutizel.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f273acb5c7---tefeferuvufome.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/0be768ab3c7cc1eee1ebfa6177910fd6/62272245175.pdf
    • http://adainst.com/uploade/files/20210620220356.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=adverbios+en+ingles+ejemplos+con+oraciones
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/2e48146c42f06e935396a59c370a9fe2/dilunujuvagiwe.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_off0000f0a2.bin
9486e2f5c247b42d28c90683e7716fe632c34d5beb132e4f7de37eb3e2caac81
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A2 18528 bytes
font_01_sfnt_off00011f4c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 16792 bytes
font_02_sfnt_off00013763.bin
23da25332f84bb6da5f616509bea6d6cdf2e5f4a0088a29f75ac3de6eddec4b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x13763 11076 bytes