Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb9ab08ab44df82…

MALICIOUS

PDF

88.0 KB Created: 2021-06-26 14:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f1479811d38c9d889520e9621e85d0d SHA-1: f9d975430aa26abf2daa0e68c435dab2661fe9bd SHA-256: 2fb9ab08ab44df82db12dad202a1a94cd8f5f33d923d12200e14c66f7b5c7720
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identify it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated and unreadable, but the presence of numerous external URIs and the link farm heuristic strongly indicate the primary goal is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c12c89d13b1177f10bd5f2f74f231791/lolurexijuridid.pdf
    • https://blokhol.com/upload/files/26892608492.pdf
    • http://beiwendq.com//data/attachment/file/xafade.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/p9a7gu6ur8jq4q7cii2dm512g0/lujos.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/e79527901737b31a06293843a183c237/voduziteruvesidop.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a25245ce3fe---77832675449.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c24a8e03b5d---vimopefevonisewijuvobulo.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aec161abd13---fejopasamiximojon.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/989ee2f0b0edf1614827ce3f7a7401c7/gezewifasu.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/210d5bd86e184fc79c29ea0f211bfb4a/26490735357.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/763f1301fad009c285479dd63164eb41/47243808417.pdf
    • http://naturalmis.com/userfiles/file/6984208030.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4eace95e2---89195088245.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/976f85dcdd961a638e9ed52bf16a6c00/97283833312.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609631130973c---93165429221.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084d13819506---sowixadurofuribewikila.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/cbjqaie4e6jk28jbu0tahj4gnr/kumofewusoragesizon.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/4aec42c406eaa6245310a2a8cad23527/48593146677.pdf
    • http://kccmaul.com/files/files/wapejujakufivafavafos.pdf
    • http://suachuabaoduongmaynenkhi.com/img_quanganh/files/42713413981.pdf
    • http://www.awakohchang.com/image/upload/File/ipuwukufozib.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/f2d8e288f6e2673a0aa4cd2aad4d823a/71179600061.pdf
    • http://daycamhoa.net/upload/UploadFiles/files/dikebafosadevinon.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/939b36b075129d841124a573fb21defa/78230687223.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=ast+meaning+property
    • 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_off0000f770.bin
cd4f262bf590d2c825e085cbf9f3933788457216c026f14631ffa173663bf5af
pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 16584 bytes
font_01_sfnt_off000122a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122A5 16792 bytes
font_02_sfnt_off00013abc.bin
9a6e6514ab8422299b522e3cbfc42549a75ad1cd2d9f9c514fc97b8a0bf304ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ABC 10644 bytes