Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f271194063d26f…

MALICIOUS

PDF

91.7 KB Created: 2021-07-17 17:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fd7f69649e61177174c1f57e916b717c SHA-1: 9f1ca869977f4a07533857c830bbb40a36e30361 SHA-256: 80f271194063d26f4fc7ee869eda29562e50a426badb2aaa615c0ac4249b9cb3
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://campfirewtx.org/userfiles/file/59716610466.pdf In PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a885bb0db---gazirawumomanigoxifogotol.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/28311658251.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac4e1d7d87---sosuxurajerafeluzi.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb656b872---pijikatemomuxa.pdfIn PDF document text
    • http://gyobel.itpublic/file/doxoza.pdfIn PDF document text
    • http://schokobrunnen.com/idata/vimesogon.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc639fdf084---40611991740.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/xakesumimiweretarawu.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/digorozinexonixepidike.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608709ace8cd9---godarurezosuwumesoradup.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc3eb348cd---jixejuvujevebexun.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/79159616859.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-24/20210524082236946086.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/gubutajofonoxuk.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/5358cf4ea96233de3dfdb83ebe441c25/viluxapivori.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/genumekuwi.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/jejilow.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/19eaodfrrn0oo3n2nuuse96e36/18114265010.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609241e6cc0d3---dumetapojetojigozo.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/retipadimajimozenemafilej.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/o0anjdagv2umr3ubkngf1kh8ac/xozejakifivope.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/naxezabixagededeneguvak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=kelly%27s+off+licensePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E78 17100 bytes
SHA-256: b42ace28a77fe59209e897f8663aa94aed7b98aae7306657a73ae5191761c815
font_02_sfnt_off00014b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B4C 10108 bytes
SHA-256: 91ad15907aedccc185874dd0836c4c03a53d350c3852c9777a77bed232c975b8