Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac062caed996a13…

MALICIOUS

PDF

94.7 KB Created: 2021-06-28 02:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55a6f20b96d33af6827c7129ad18e158 SHA-1: 3a383c5804d300b04da90a7af2437fed40233174 SHA-256: 7ac062caed996a13c9a490a84d6151307ce89b73ec665af5f497c802d0a4dc8e
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, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://infiniteprospects.com/FCKeditor/file/ferilimofapo.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/m9mpv39kte2ekf8a5s7daqod8j/19814544956.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/7b3e831e70f46fa623c097932f6acf5d/jitidekorubideginime.pdf
    • https://ahreco.com/uploads/news_file/jupupa.pdf
    • http://www.bluewhaleline.com/image/upload/File/33844258921.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fd530992a---padarerurofi.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a694395d1df---27849200450.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160822b72b21c3---funeg.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/4q9um7fmud3j43shp0ok7mbrde/ragejezasiwivaxana.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/c33fbe0576435a390b8eac2fbb24936d/munosegel.pdf
    • https://ryokanclub.com/FileData/ckfinder/files/20210618_07A367AA474C6F5B.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a448beda92---49206777855.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/c8755040961fc1d1306434e370ce46ad/63457843665.pdf
    • https://vegan-eshop.cz/data/file/45209257977.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/zitapitap.pdf
    • https://thingstodobahrain.net/ckfinder/userfiles/files/98854665622.pdf
    • http://demirlermetal.com/resimler/files/67464836907.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/18268689007.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609badbc32830---74134590913.pdf
    • http://guides2alpes.fr/uploads/file/98338795104.pdf
    • http://kwong-cheong.com/userfiles/jivakukamexesupotam.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d29727e61f---99820505420.pdf
    • http://szentistvanpatika.hu/upload/file/80897085714.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/b30280bcce7c8c937e9006fe90f34b4a/nabin.pdf
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/74008204391.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/43af45c1f1e390071e0f8fd7e1be2cab/vedubusagojibidi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+become+a+federal+judge
    • 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_off00010f2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2A 16792 bytes
font_01_sfnt_off00012741.bin
9542d3a509eb624d77b0db17dd6c0400fb2684b4ea308341cc8ee904071d352a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12741 10904 bytes
font_02_sfnt_off0001405d.bin
28c29e09436057e8a0be8003f7873bde825b0859c2b22edd7973e4d0890c0dd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1405D 17228 bytes