Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38307e8adc60ea7…

MALICIOUS

PDF

86.5 KB Created: 2021-09-02 02:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f571826a17b410021bc452e02e946cc9 SHA-1: ecf583dcc61183763029842a8d2ceea25d89ce67 SHA-256: a38307e8adc60ea7b2d3fbb855de5fe7c87858212e4463583cb26f1057dd0412
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites. These sites likely serve as a distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://getadoc.in/ckfinder/userfiles/files/fimomabowiri.pdf In PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/66c4901485002f9a6f7a35a4f2b92f8d/safafusepexetesatur.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/26023608a96131bbe5ef0bcb22c3f0b8.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a628b255a6---25764993932.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/c3f2a8e3269de0a23ac4ad2f2058090c/37516248230.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/6744807825.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/39057126551.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/vinidesog.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/buwabu.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e01e4fb511d---fogabaw.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/sibokolofosimukezewufetib.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/14aa189e75e333ecc10ff6b60fa72e06/78784158966.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/selilotevetuxilugojupof.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3fe46daea---77812155404.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798b21b786e---masesufudowubenarefib.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/24000265680.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/37216455009.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210803_FB8C4D7394BD6F3B.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/patepi.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/0495c1ca3e475e5fa51280fb118e5f59/63330235073.pdfIn PDF document text
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/pebizatapabazikabokuna.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/9743011066.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=example+of+qualitative+statement+of+the+problemPDF 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_off0000ec71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC71 11160 bytes
SHA-256: 21c7fedbb4a42c12d12d1b8a132dc7a28b05f451985ebc1e3977143034a8603d
font_01_sfnt_off0001061b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061B 17708 bytes
SHA-256: 547b799fdc5170a3186324a82afbb9d6730c8192e55ff834f354d1bb8c6b2b44
font_02_sfnt_off0001341d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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