Malicious PDF — malware analysis report

Static analysis result for SHA-256 969ae26e1b7acdb9…

MALICIOUS

PDF

96.8 KB Created: 2021-07-07 13:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d9629f189e3d98b0ee86aafa73eb1281 SHA-1: a4d8471c21b9064fe6b61945590b4c3bbc79a4bb SHA-256: 969ae26e1b7acdb9615e369aabc1f5d45bc32f54613d5dbed8f58601984b174c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories, suggesting an attempt to lure users to potentially malicious content. The presence of multiple links on disposable or compromised hosting reinforces this phishing-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16094e04529973---65930241505.pdf In PDF document text
    • https://fertilizerproductionprocess.com/d/files/lazabibiludemixode.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/52fcbe834f8a67d0a7b79424a660d155/53705992339.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/samabosuvavipofejamaru.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7eea60cea9---baxelugorutozafejax.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9tt1k618svbj2154t28pr9g022/relagib.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/6288ce20f785259337bac0872a90d8c7/balamijotaz.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076437c7af17---49635775598.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/d178c61916f7b46ee86f7f940b86b1c7/63986912658.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607444f6a177d---18384351059.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a5803ca06---54349578438.pdfIn PDF document text
    • http://veivel.com/userfiles/file/turanevo.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/31079338456.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/bb9f33e2fbcc6200efc3869cccdb58d4/vifipopuwaxupof.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/27c3387a19ca7ea0924f2ff14ec43d5e/84746343087.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/vegojebuzixukore.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/77630706185.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/77380599680.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/noranukowulegiroxitobuwa.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/9514616843.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/81b3c9775f304a0efaf093df1c0e5772/82615787240.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d61ca4268b0---juzixopi.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/vajinazimi.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095497e9578c---47071570666.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/51489567999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+abcs+of+gene+cloningPDF 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_off0001193e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193E 10520 bytes
SHA-256: 538b9c3a9425eb56dffdabbca25c88e59af00dda70c3f9bc8964929a98c450d5
font_01_sfnt_off00013115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13115 18104 bytes
SHA-256: f6f6269a2738251520c7d8e7d65cdc6ab82b24e64c9b37bb1f2102683828db28
font_02_sfnt_off00015ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1