Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e1c27dc647d9a8…

MALICIOUS

PDF

76.3 KB Created: 2021-09-07 17:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e598a41a0bf2cc7abcf58bde13ebc094 SHA-1: 75b4ab46e8b21a1264df6d150adb4d37a88a4432 SHA-256: a5e1c27dc647d9a8393b4823b0374a803eeefd8a9f1ceb9357a082b760ca4c9c
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms or disposable domains, suggesting an attempt to obscure the ultimate destination and evade detection. No scripts were extracted, but the presence of numerous external links strongly suggests the document's purpose is to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://gelikonline.ru/content/Files/josoxusopaz.pdf In PDF document text
    • http://tragiaocolamsapa.com/userfiles/image/file/16155197909.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/6961178287.pdfIn PDF document text
    • http://shosholoza.de/file/wagisibosumusozo.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608832c8eb1d4---61315390194.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/ff9973c8cce96d1be224c5f1707bde6e/tugemexe.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d22b42331---menepojoxipefose.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2538c19d180925d36b8651e94ae29e8e/9890935881.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e6ae17a28---rubasitatugen.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66675f2cf---norikuvonidagejipuje.pdfIn PDF document text
    • https://ms01bet.com/contents//files/memamimafolegix.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/72dce794c6355a5e295621df8446b1ef/lizabegisulujaxedo.pdfIn PDF document text
    • https://dhcom.vn/userfiles/file/rifopavate.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/50976087848.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/63760144711.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/4mrf2lpo626b8qau0ljtj9soc4/53770354791.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/vedujujafemaxogusogudo.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/64d94f1b9d8d07a10c2c8bc077738566/vexilekutilopuwesez.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160874b59c383a---86410277377.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/dixaleminivuwedemano.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents//files/wijukilemomuribekel.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/bdb5819a547bd88305559a7cbdf0db96/misaselisunizo.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/21457707599.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b3d9c1a78---wifagumoredakefinivofi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=variables+cualitativas+nominales+pdfPDF 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_off0000c6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000deba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBA 17036 bytes
SHA-256: 004e435184717020e83ffe92793c9cdb25ae2595f9b751afc728cd259877ff4c
font_02_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 11056 bytes
SHA-256: c4d5d965f95aa9620c6925180ba5febfcd1062bc7972ceeffb66098ede3877bc

Open this report in the interactive analyzer, or submit your own file for analysis.