Malicious PDF — malware analysis report

Static analysis result for SHA-256 790fb2654a8ece34…

MALICIOUS

PDF

84.7 KB Created: 2021-09-19 15:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: adf2bebb51061dcc663da28b62bf1017 SHA-1: c2875c732e57e4124ed83dfac9826d4ee1a507d9 SHA-256: 790fb2654a8ece341d802af9d66abcaf796b80079c62444a6f7219bdaf4cb0fc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as containing a link farm and pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://movimientofamiliadejesus.com/images/uploaded/file/70379044860.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e68f3bf87---gamedefakifabevi.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/42c50740506bfb968c7059f379f40fdf/20739492968.pdf
    • http://dga.gr/ILC/img/file/78088226847.pdf
    • https://elegune.net/files/galeria/files/45925898085.pdf
    • http://stepasidemedical.ie/images/uploads/file/dakipovevadosel.pdf
    • https://advantagelic.com/singhania/downloads/file/74180630913.pdf
    • http://stfurnimart.com/file_media/file_image/file/22740267599.pdf
    • http://www.hon-ro.hu/userfiles/files/dewego.pdf
    • http://easyliveconstruction.com/ci/userfiles/files/pudegegigu.pdf
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rulovomisu.pdf
    • http://140.121.161.111/ckfinder/userfiles/files/30789523791.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/08e153b56ca89ab22f6e1a818b35999e/lazuterowekibajigixa.pdf
    • https://francoisdaulte.com/ckfinder/userfiles/files/23496818638.pdf
    • https://keluargamimpi2.com/contents/files/jegasabiborumufokok.pdf
    • https://lanegarrett.net/userfiles/file/nitizarutogax.pdf
    • https://grandiosieventinuziali.it/filesUploads/file/likifalenubel.pdf
    • http://abwsalisbury.com/uploads/files/13408497518.pdf
    • http://riasztoszolnok.hu/admin/fck_upload/file/vegeni.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebcd35aab3---43965079747.pdf
    • https://www.prshots.com/ckfinder/userfiles/files/75072703028.pdf
    • https://excellencetogether.com/img/files/file/92432311692.pdf
    • https://studyhalltracker.com/files/file/befupebadozata.pdf
    • https://mandarinkinesiska.com/userfiles/file/83430922000.pdf
    • http://bhk-aindling.com/userfiles/files/kuvoxozowudo.pdf
    • https://kstraders.com/userfiles/file/bapimesevep.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=messenger+for+android+5
    • 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_off0000e9fb.bin
115e8a784494d02e0da66f0213f51922840da42444220f2ee820d34c06f1e56f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FB 10512 bytes
font_01_sfnt_off000101db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101DB 16792 bytes
font_02_sfnt_off000119ed.bin
7a7b2f13d7b7bae5150c8150259bf8a28659040b188123377a04c1ff8faac963
pdf-font-stream PDF embedded font (sfnt) at offset 0x119ED 16780 bytes