Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8122be7ebe4ed0…

MALICIOUS

PDF

74.5 KB Created: 2021-09-03 08:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 61aebd536b8e1715bd7296cc009e07a2 SHA-1: 0a667efe630de876812622feb39dec4eef7d2949 SHA-256: 4a8122be7ebe4ed074aa82cd70cd6944fdf0e24aaebbaa0b70a4a719ca4a7ffb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect the user to malicious content. No scripts were extracted, but the presence of numerous suspicious URLs indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://irlanc.ru/uplcv?utm_term=tutorial+activinspire+pdf PDF link annotation
    • http://3qlohas.com/CKEdit/upload/files/resofadibuzol.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46ecb74e31---97058754698.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/015i1i3dvbhgg4v8pglolo8nh7/75096509971.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1612c64b83a8f2---35474525364.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210526164655.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe52787557---21566870481.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c9c0eb86f4f03b52a12251909d5ae7c9/repolekuvu.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160845379e971e---89818482041.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/tiwubefonaxasixav.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/53629090732.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16074406ed176d---selemenitafozob.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9133116f65---xajuxuzozafesimer.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/aec59j5d503e0kq9sq7b4l85fj/91253766301.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/kuzevisu.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/43738905133.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2b103d214---55912071464.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/6043995365.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e646dfabf8a---45935099646.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/sibisetazuzetututaw.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/60680547351.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/ba69e3b8d7c488d1790eccd61bf59a47/bamawixavejusa.pdfIn PDF document text
    • http://irinabailey.com/upload/files/46301428603.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_off0000be03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE03 10744 bytes
SHA-256: 0bccd26448ddba6a9f45b665d1b8910edffe006356230e22ed30c2aae8133e39
font_01_sfnt_off0000d6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D8 17856 bytes
SHA-256: 12a86ccfd3b55971c23275f913c394b9e21acaeccc2edaa5220b1b5d4a04b709
font_02_sfnt_off0001050e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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