Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d32298dce8d60b…

MALICIOUS

PDF

104.6 KB Created: 2021-07-17 00:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d17cb6e68a0fc7d59c7dae41123929b0 SHA-1: 65fb4892153391b7a055162cf478fc0fce534742 SHA-256: 70d32298dce8d60b841e3809c539b67514a3f656aec74ad6eaef847174ba6be8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload directories. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose, which is likely to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//japevupovitugopex.pdf In PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/rvcu7gpm1hhhfl6vnsmaj0tia3/60984500116.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac404b0eb00---xobisuxekigasomodase.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/67755306784.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab99c348e8c---falenatevijisipinamawixi.pdfIn PDF document text
    • https://icfas.net/icfas_new/dev/ckfinder/userfiles/files/2885547570.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/lapazuganaxiwi.pdfIn PDF document text
    • http://01host.ru/userfiles/files/14924370126.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/47096387362.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776041d5d1e---1390904601.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/xorikajelidalav.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/tasofowubu.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/79b164e9136d26ca0f75f11d40b5c279/66937965602.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/9f97538610eb4647f7424c4128a3e686/96136096994.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/694fbcd2f84fd29ec4dda7683a021646/56131349885.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/8d1558c2ce2137c9b21bbdf1e0ddf806/54799079452.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/78756793292.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a9e8e2d81---mafelaxijedopudolob.pdfIn PDF document text
    • http://recviem.ru/img/upload/31318650510.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/53400760975.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c46a8436b---gapekapi.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/67635037265.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/41846318968.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859886a55de---44873888717.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825b59e0cfc---selor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=an+electromagnet+produces+a+magnetic+field+of+0.550PDF 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_off00012db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB2 19000 bytes
SHA-256: cef9d386d47150a77ab356fc71d3402a9891fa43e2e1c1ecca82dbbc32a35a36
font_01_sfnt_off0001600a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1600A 11368 bytes
SHA-256: a2a21dd573420a17f5dade82216d2058aaee16a6b325ddc82c78fc5b3f39a3ac
font_02_sfnt_off00017aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1