Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf0e8cf8e6fe9e7…

MALICIOUS

PDF

94.3 KB Created: 2021-07-19 08:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6a521655641866ca35927f4109b64898 SHA-1: 7322948bb5d419c5ab3f7abe75a2c86c6095eab4 SHA-256: faf0e8cf8e6fe9e786e78eceef3cb8e514afb3b0c45c248872fff811832d1b96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms strongly supports the classification as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/35784db56473efba600bc0817219fbc6/69374307378.pdf In PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/8d9774cd0afa74d1c20e6722fe2bcaf0/lamijenoketufad.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/garadefolebaniritunupa.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/4043697337.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/paxovu.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a91db1cbf40---pujelisefebutaxojunirovo.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607944ce961b9---47125169712.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/22533333981.pdfIn PDF document text
    • http://surtek.biz/image/files/20150114_231618.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/6b23093141649e94c49f69e60c165a73/76830840201.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/369452d8280f00c0fcc92241cf62c542/38335261745.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/88e0a2543ed8afffc68b4b361d6e75f6/51436050718.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93830ad0e6---xobovegevamodojeraru.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/dixedu.pdfIn PDF document text
    • http://fitviewer.de/files/file/devikibamisa.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/1d55efe384241d1e334375999c3dcd82/kebifedogijiralomo.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ada3e7f4fb---xotetivezodovuganixidiwom.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/at3c4id5es4nstercvshk1d282/barusekumuxigesif.pdfIn PDF document text
    • http://fabtur.ru/upload/files/70044149133.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/79f520bfce2d728f90c7062038e5444e/13630601633.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210606_052851.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/mic098cp799ul2q31302fh2cu0/falisikatixusafoxan.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/92350841373.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/tudora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=triangle+is+strongest+shapePDF 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_off00010aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000122c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C5 10492 bytes
SHA-256: 60e12873f706ce939e6a38947acfcbcc8593198a9d94d3956b5739f03a2c28cf
font_02_sfnt_off00013a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A87 18460 bytes
SHA-256: e704ff96d74403803c12ec0253b03b7a42bd7a72d59dbd93c58f0f3d3abc913a