Malicious PDF — malware analysis report

Static analysis result for SHA-256 64caedef32a0e712…

MALICIOUS

PDF

69.7 KB Created: 2021-09-08 08:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c5dc367623db621ca0c793a4e26d60c SHA-1: 541a67916760556a7e170788ef2ebacc8b419a0e SHA-256: 64caedef32a0e7122cc81cae7b3bb614b9695d0a36efb16513774864be221abf
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs a common phishing tactic by presenting itself as an image-only document, likely a screenshot, to entice users into clicking embedded links. Numerous URLs were extracted, many pointing to compromised CMS uploads, suggesting a distribution network for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://catamma.ru/uplcv?utm_term=serialization+in+pharma+packaging+pdf PDF link annotation
    • https://okazionche.com/files/71785619818.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c63f5bc9d5ab3b30b9e4c8a73e4d9bad/92304509384.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/44536472821.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/10261523477.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/96ccf31b4c331027db9a9c6a08e11cc8/64283235475.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/51094318636.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/44684152756.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/bazej.pdfIn PDF document text
    • http://erictex.com/ufiles/files/parasiwa.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160876e6192feb---vanibofi.pdfIn PDF document text
    • http://sanchariglobal.com/userfiles/file/18491966817.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/icefic36efegthhibpmkpvsoin/ligolixevuz.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/77478463216.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/ravirifazoregeworobud.pdfIn PDF document text
    • http://targdenunti.ro/userfiles/file/banozubag.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/xijizonolamamanevedibifus.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/aa8ca18f957dc9f1d2f480e79c8a5e97/81270615263.pdfIn PDF document text
    • https://laps.pl/userfiles/file/buzekudatotodojew.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160710df13f092---90495675037.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/23682461235.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///palunivasutenup.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/37t1dcs6pse6oe7gf2eufptinr/begomodeporisap.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c92d229a87---51674866316.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/xirofimujipi.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/mazexizikakimasemetav.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_off0000b462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB462 13972 bytes
SHA-256: cf71486394a14021f0f0bc52042de30f9b79beb1b3f995cf0030abc461487e26
font_01_sfnt_off0000d6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF09 11128 bytes
SHA-256: 2712ae98971647f8237f9b2f7c33fc9bf309206c5a05d7be498cebc7636d0ca0

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