Malicious PDF — malware analysis report

Static analysis result for SHA-256 04005040b04187cd…

MALICIOUS

PDF

87.6 KB Created: 2021-07-01 00:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: a7c2d2c737bbbca615803589e3131262 SHA-1: f576b17d3db4e8bd513bc164c496afbb4dc19940 SHA-256: 04005040b04187cd4970fd9b28a8f39c4342fc32b89dbd483fe65a7fe5e34f6d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://m-co.de/wp-content/plugins/super-forms/uploads/php/files/iucaqophthakma40us3qmru5ve/nefagabixotud.pdf In PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef6c640355---1929411451.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/e5bf58c06d32c55efe9ca5e38e737cd3/fomanoxulibesefima.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d4997203e---62361148414.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/mr2o6uc8sffdi09s3165ucm5q6/71351983024.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da6f6c82890---xemitafuju.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/63134582465.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160db777fe43b9---30335097788.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a8562f238---22293012502.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/fiwuropelafebavaxoturawa.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b13eabec2---rerasolumuwasugodoxepep.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ad84dbca927c9a185933330d1dc4de36/tabalunokibimezuzodabibej.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/60438060238.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/5frl8i56d41kq0ge2t0gcgc165/43359699698.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/68321320773.pdfIn PDF document text
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/nusaminugu.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ba9014eca078cc4c3f9e9653a9aae155/xabekidanipetarijikololev.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/wosisuzanafumoromejiwoji.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/43307046312.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/67915325011.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/ece9ad919c4c9b04786925cd1b22aebe/81930331036.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/1850507519.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=beach+bumming+meaningPDF 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_off0000f19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 10436 bytes
SHA-256: 1a29e43ff2d178daae1b269aa80aa2bfd9f248c717e945bcaa376cdf35b9edcd
font_01_sfnt_off00010908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10908 18604 bytes
SHA-256: f812e74c48e8d473199a8a4119eb1414cb0fe3ba329da64e37d67836052dfe44
font_02_sfnt_off0001392f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1392F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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