Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b2049ed986f05b…

MALICIOUS

PDF

77.7 KB Created: 2021-09-18 03:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e2fa4b29d62efd52225a4dbc2ec64354 SHA-1: 878a962b9059bb35fc7b4d866259a2a47df23d03 SHA-256: 88b2049ed986f05b7ff0a2477332fe2871a3b69d65f86413a77b36a44d5b75a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ketchas.ru/uplcv?utm_term=samsung+j7+core+flash+file PDF link annotation
    • http://support-cmu.com/filedata/file/fewugun.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/bamemejaxulubajibomusamim.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/seruratirokozavodobu.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/87632596592.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/79558688815.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c472394989---regarepefovogovok.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/nuvubomuzakefas.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/65811495729.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/8476311871.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/xonapupujuzaj.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c46678de05---xuzixif.pdfIn PDF document text
    • https://partetesal.ir/data/file/fubobuxolaluwotaze.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/85735725935.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613856f3422ca---zijura.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/10356059164.pdfIn PDF document text
    • http://shamayachts.com/upload/file/36034007954.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f4574000bbb90d40dedf2aa4383c3eaf/42369367416.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/bufajazu.pdfIn PDF document text
    • https://123natura.com/stockages/files/88712245059.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/47515026558.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/47514304222.pdfIn PDF document text
    • http://zimmerei-possert.at/figiz.pdfIn PDF document text
    • https://fajanav.com/aym_image/files/90190646765.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_off0000cba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA9 11040 bytes
SHA-256: 1b616785bdf4f84c99153830cf946d21305bcf17c781f32c5ec7be9b2d210c91
font_01_sfnt_off0000e523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 16828 bytes
SHA-256: d5e850c0675c7edeec61786ddbce5dcf0a9555cf62e863bbeed4b47b5313b8d4
font_02_sfnt_off000110ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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