Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba877de7dab09620…

MALICIOUS

PDF

101.0 KB Created: 2021-08-03 22:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d295f471298a5593f7b55214e58f16a3 SHA-1: 38475ccfe9673291ec57372f6e59786f82d87602 SHA-256: ba877de7dab09620884eff590d190286ad853bd7cff8c12a4d878765a6cb1121
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ef08edn4epc1rcpakh8sc6k9oi/95474084456.pdf
    • http://slstudio.it/userfiles/files/86430334515.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/40mb9frsbf8pmto5ktfpaqvu8c/35852544947.pdf
    • https://akanaymatbaa.com/calisma2/files/uploads/40580453768.pdf
    • http://ozkayalartrans.com/userfiles/file/sogarojal.pdf
    • http://bannails.com/fckeditor_userfiles/file/20378614564.pdf
    • http://originalbau.hu/imagesfiles/naguduj.pdf
    • https://www.hemingway.bg/app/templates/js/ckfinder/userfiles/files/30774502117.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/70506ff6d04c1418db823d7bcc1cb503/kopazozewinodojozuzededu.pdf
    • http://cornucopiafrederick.com/uploads/files/21648217377.pdf
    • http://tnslib.net/userfiles/files/22847523850.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7553c2879f---9086994358.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ad9c119e4---wokezunuxibuza.pdf
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/mafazav.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/a7us32d8hre7lev8o9e8qg5di2/52245657049.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/32a0950b821f261db19171f69dda1c76/63304687156.pdf
    • http://i-daa-wl.de/userfiles/47650141649.pdf
    • http://budohurtsa.pl/userfiles/file/vazadejikan.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081d3afb70a1---nobixalebipodomek.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f599b0718d6fd2537ec5e10c710a9380/44030888247.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d364840ee57---gater.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/kl9u7ijnii321185dgcif0k0os/56989596877.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ca9987412b9787f80d092ff5a59e46f4/27438644808.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160821274bd65b---86354142164.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/98ec001b4391d7f5eea41ba84a2cab96/potilewiwobiragak.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+is+lady+macbeth+presented+as+powerful+throughout+the+play
    • 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_off0001252c.bin
0ee48fe920a78e5bf05ac764256965596c5ed2e4caa73384bb210a5c8f2385e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1252C 17452 bytes
font_01_sfnt_off0001523d.bin
fc7698dce0d47617dd7894b74ab280cccf6106301667a86af3519a5631ecbe88
pdf-font-stream PDF embedded font (sfnt) at offset 0x1523D 11496 bytes
font_02_sfnt_off00016ce1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16CE1 16792 bytes