Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca7ef340c0d81a2…

MALICIOUS

PDF

85.2 KB Created: 2021-07-05 05:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a7a024493ad845d186446042f7dae584 SHA-1: 022805d27c14b4d49a985b4871eba2e5ba8a23c3 SHA-256: aca7ef340c0d81a204e2a8851f824ffd5bb367ee65e7013d4d19a4f2503087e3
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the overall structure and URL analysis strongly suggest a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://tomnhenryanderson.com/clients/8/8a/8a1068334c160bb49438aafe8043afff/File/7297596150.pdf In PDF document text
    • https://fizjolech.pl/userfiles/file/mitekupug.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c974b99e99---52515539866.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607070942c1f6---soxolipovenobiwimam.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074f85993faf---notegufosavisebumusibara.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d94efedfd60---92221193153.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/veziturizu.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/83157031339.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/vn90gfha7um99jlqdljqaorui3/18392045027.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/wexetopixoginoxebuwifiru.pdfIn PDF document text
    • http://hghs61.com/clients/9/98/9814c5f28b4e93efd1f74733a9fd6b0f/File/womipedupolulax.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/2e0fa9b0df7a447201b018b9169a5117/padusupogodizerepejaja.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/4bddcf3d16ca5d16923c8bd358d32a34/80563661603.pdfIn PDF document text
    • http://simonide.org/userfiles/file/52296315482.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/mugasonukilipituka.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/45402168349.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/74739799292.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/goxezunotosolixebujeguf.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/472c7a32f3022a14aaa179444411c959/vovimiwadixizafila.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609178405c54f---jojitijowojuji.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72b5b40c6---rojab.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1efe36b18---6853602385.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc845d9eec---9067919771.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c704c827f94---48821935695.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/jifuvipuvobozakaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=design+thinking+and+service+designPDF 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_off0000e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 10644 bytes
SHA-256: 360407d5fce1a40a74c3d9a92d5e3f1a5ee171951dd6f35054d84e3e5c34b0b6
font_01_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001193f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193F 17212 bytes
SHA-256: 3f98c7c9328c49d17305c62a4782fd30944494ce103479f98431e7224536b170