Malicious PDF — malware analysis report

Static analysis result for SHA-256 8282a2f47ed68add…

MALICIOUS

PDF

94.3 KB Created: 2021-07-01 15:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcd8bf2a3393477e3441f9852f34b4ba SHA-1: 92d260cd60f64fe4204607c402749cbd99483353 SHA-256: 8282a2f47ed68add0b4e65d13d3d8d768c0e3a77a3b1b04842e1e60545e0bc7a
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://russkiivopros.com/images/FCKeditor/file/51579822554.pdf
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/fedujafev.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/c1f8b46dd7f07f5302fe831f28133e3f/8368057695.pdf
    • http://automsystem.com/UploadFile/file/20210701202209994.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/204f21e14900ac582fb4b32f126e5fbe/lofezaziriredevoxubosopis.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/285157172e5a4e16a19653167fb93b91/sisetaxazupesebim.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608491481239f---75618389688.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/ede6c6d9a8711a36fe9fec64c61f0fd0/lufum.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b81050baec1---xagupigikibo.pdf
    • http://auapp.ch/userfiles/files/taxewadelipilomudezeduxam.pdf
    • http://csc028.com/userfiles/file/20210620174419_0mwzzl.pdf
    • http://ash-graphy.com/userfiles/file/14180401031.pdf
    • http://jrpst.pl/userfiles/file/22971163070.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/42b2e8228697edf34840bd45c0857c54/tegimukerulakivagebin.pdf
    • http://hodori247.com/uploads/files/nebefisozaxafozawaliwigoz.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e3804f9277c1f9197c0e98db175a4ba9/45380659350.pdf
    • http://atdawnwelift.com/userfiles/file/58056312713.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5b0c67129---rixeba.pdf
    • https://rintrans.com/files/didexeritopad.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/26a6c75b20dd6593a55f469fb3a392be/68876243219.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/8e8ba29501f702eeb909c49de09e234b/61365623149.pdf
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/18990590389.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084da804bedf---35364936360.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738f932f775---39496476548.pdf
    • http://archi1919.com/smlclub-files/file/ruwexod.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=roblox+strawberry+cow+outfit
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f047.bin
7dbb866ff97b9cc08cae36907640aca403bef43829b5c99eb1e7ba4d10774d07
pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 20316 bytes
font_01_sfnt_off00012472.bin
82b29579117ce491459152fbb717c0b9634dcbfd587d56f7008ad3fe326e034c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12472 10812 bytes
font_02_sfnt_off00013da9.bin
2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA9 16204 bytes
font_03_sfnt_off0001535b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1535B 16792 bytes