Malicious PDF — malware analysis report

Static analysis result for SHA-256 a700d98252830382…

MALICIOUS

PDF

82.0 KB Created: 2021-09-15 13:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c00c2485e313c47ea3ae1c3a5a74d539 SHA-1: c16c6445fe454ec5e8ad85657fc8efd33b237d9b SHA-256: a700d98252830382af5c4909e4fe1ef82ddec86e4b744b6c30d2eb7d562aa966
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest malicious content, likely a phishing or malware distribution lure. The presence of embedded JavaScript points to potential exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=android+12+chromebook PDF link annotation
    • https://kubermatkaplay.com/ckfinder/userfiles/files/molasixoroxedojesagir.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/mezurixi.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/31835154296.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/42580150207.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613291a8de797---jevuwuw.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/89142801737.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/98784520195.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/paxejirepafe.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/wubavisovebowuxinamarowa.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/206f7874028a428a7fb7cf7594610f0d/74172159193.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/85243948236.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc68d638de---waxamadoloximezojisugow.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/sexadukixozemi.pdfIn PDF document text
    • http://dolonchem.com/upload/files/13964633175.pdfIn PDF document text
    • http://getem.eu/files/file/vuweko.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/65109255110.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/jexizivusaf.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/wufigelejatuniropakowanom.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad7c42615b---gekowixakofudesumusisanan.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/kurige.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/78703710174.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16130052079b83---32217223780.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/93784057846.pdfIn PDF document text
    • http://e-hematologica.com/users/file/dutezowekejomotu.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/bakajutuvilaguk.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/19583108546136c63b60113.pdfIn PDF document text
    • 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_off0000db9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B1 17976 bytes
SHA-256: 26fbb04a70a1facd1b827dd840c5b94f35517f10ed2ff89209df22ee19b8a5da
font_02_sfnt_off00012271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12271 10548 bytes
SHA-256: b3bd43189ccaa1585f96f6107e39a1e9e54a77e96e81af7b5dbd239fda21b35a

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