Malicious PDF — malware analysis report

Static analysis result for SHA-256 564aa62204a37301…

MALICIOUS

PDF

94.6 KB Created: 2021-07-13 02:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8da7b6c61ced41ef03850e54ce10dec SHA-1: 449e8b46f2a01ffd2f98234ebb17afb42bf4a759 SHA-256: 564aa62204a37301790e723f41ec2ebe0db587b7bd28eb30fbb2ae0f9c319657
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload directories, suggesting a phishing or redirection attempt. The document body is unreadable, but the presence of multiple suspicious URLs strongly supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c98933bd015---fikumidelise.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/59574184126.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab858faa6a3---nideledifewevumavel.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd068d5b8b---28767722315.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160711a2a03276---41626692598.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160721a366bc57---fipakanegosovesodul.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dnkd1rco6eh42bmeb5d7hnkdh4/67305044404.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ejbkk4vcnegnmm4j9gnaijmeoo/60548861350.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/2181637859.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160e194e60285c---dobuvosif.pdf
    • http://ownlines.com/upfiles/file/lekifolefej.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aae3203d7---77935489686.pdf
    • http://cbgnfinance.com/userfiles/file/38023418357.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d7b477e72---34454594785.pdf
    • https://universitecentrale.net/uploads/FCK_files/file/77565645107.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/349957d43dfa3c3e21727f26c49277f8/pomexevopoma.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/7e913f08aade49ea44aedb76adc5a24f/53551173577.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/6463663f61cdb578793cee7e5335b654/31145402846.pdf
    • http://fobosgrunt.ru/files/ckfinder/files/47049777050.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607d843b9ce71---fotalulomofavujemifeb.pdf
    • http://starlightskiothon.ca/clients/4/44/44db284a3a4a6a3f34f8f2fa71918f98/File/ropopefedase.pdf
    • http://all-pass.com/folder/editor/file/lusipivem.pdf
    • http://koreadramatour.com/FileData/ckfinder/files/20210710_94CA3F917278AD20.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=the+president+has+been+shot+summary
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/ca1fdec9f0bbcb3af481fd4664a70528/77088182615.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f95f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 16792 bytes
font_01_sfnt_off00011170.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11170 16092 bytes
font_02_sfnt_off000126b1.bin
11ad7658a08182ff46313c5a12b664c102425a9b9a2e825fe6d184f6329f4920
pdf-font-stream PDF embedded font (sfnt) at offset 0x126B1 17072 bytes
font_03_sfnt_off0001538e.bin
716679ee611fa54ed670b697bb550f5d005c9578b2591f937669fccaa7d96592
pdf-font-stream PDF embedded font (sfnt) at offset 0x1538E 10928 bytes