Malicious PDF — malware analysis report

Static analysis result for SHA-256 107e97536d6b3064…

MALICIOUS

PDF

79.7 KB Created: 2021-09-15 06:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 20a621bc2efd76453b72a4a46c121a89 SHA-1: 54037d4b85debd20f9374bf0354758edc31e68be SHA-256: 107e97536d6b306426bf0374c618428132f728126fce11f6fe055bcfbfca9577
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely attempting to trick users into downloading applications or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://medvor.ru/uplcv?utm_term=download+app+telegram+apk PDF link annotation
    • http://7m-shop.com/userfiles/file/gesokazizitifepurosutu.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/wajabenimibobafugifanuzan.pdfIn PDF document text
    • http://autovoda.ru/upload/files/9447634229.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/fiwixezafegafidu.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/zotoganivuvapuf.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/93886743139.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/ncan3u485s6pd9mstavhtqrvf2/kuxuvefedevuwefogatekegat.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140e72c8ddf0---zijigudifojidinixofadesep.pdfIn PDF document text
    • http://khocabien.com/uploads/files/vebosadezezubazolawakoj.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/4ebf453f2d1000647ef46d9757c033de/67799830495.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/21462335708.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090302321976.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/65003760465.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/78353852695.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/zijagukogemasulezodi.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff63312d1d---93385714824.pdfIn PDF document text
    • http://letdentalab.com/img/files/xofovipe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb7cdf62a---20925628576.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/waxegokope.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/10871627823.pdfIn PDF document text
    • https://promise-land.com/upload/file/18150470579.pdfIn PDF document text
    • https://premium-house.uz/images/file/41790098227.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/90392476966.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42B 10656 bytes
SHA-256: 4c371770ae53be577f30376bc47454845f7d28dec0e0ff2c66d697ed389b8a8f
font_01_sfnt_off0000ec62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 17316 bytes
SHA-256: 4519a3249c4c4e778b3080b824fbb815d7d6dbbc2313d6197363f3e67d43401a
font_02_sfnt_off00011916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11916 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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