Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba2c93bff9edcc0…

MALICIOUS

PDF

78.1 KB Created: 2021-09-08 03:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5f7d9d1fb945ffb8af17eb839410764 SHA-1: 553a60768d812ea2df451973333374040765d936 SHA-256: 0ba2c93bff9edcc012e63d79e15e5b355d10b00bdd0f8942c55b7801562187e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and link farms indicates a pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a243aca84---26244739339.pdf
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/kupezizewepakosifukibebe.pdf
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/15521889430.pdf
    • http://yaqeen-eg.com/userfiles/file/17530798912.pdf
    • http://ampletrekking.com/userfiles/file/repaxagobelabupinupora.pdf
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/66221365136.pdf
    • http://murasakijr.com/uploads/files/33702570735.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/815ef5bdbc895cf71b745947b60b8a8e/19885557722.pdf
    • https://abyway.lv/images/ck_images/files/25321441678.pdf
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/vofupiloxezugivorusozu.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/pdaqpte5vpp6jal2946bbstujg/78291488391.pdf
    • http://hpworld.hu/data/pic/Image/file/95460920989.pdf
    • http://mashtalkandil.com/userfiles/file/bevebowab.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160afd00b7271d---77686241282.pdf
    • http://newmob.it/userfiles/files/vagojesenanuvuwisobawakuv.pdf
    • https://mintedimages.com/ckfinder/userfiles/files/53281312479.pdf
    • https://alexandrapanayotou.com/web/images/static/file/70283022675.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/kvor8jdistg0jp788iihihoum3/42125434691.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c032f6a2b68---finopuramip.pdf
    • http://nhasachnguyenvancu.com/Images_upload/files/pukefeboruxudojomuput.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=computational+fluid+dynamics+applications+in+environmental+hydraulics+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_off0000cd59.bin
fad8c58c736fc47979c5cfe8acd2eafba549660f9cd7c4d7c4eda648fdf23058
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD59 16652 bytes
font_01_sfnt_off0000f871.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF871 16792 bytes
font_02_sfnt_off00011088.bin
5ba22e35975af348fc0fef7d393e8c68e8cd201e8aed95134381f2ae9cb2a189
pdf-font-stream PDF embedded font (sfnt) at offset 0x11088 11196 bytes