Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d51251114f8beb5…

MALICIOUS

PDF

85.5 KB Created: 2021-09-06 00:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 865ab34782cfac09d7e2eb3c4bddb6b5 SHA-1: 645831b628143bce061b09aaf285eabbee5495c2 SHA-256: 5d51251114f8beb5a84349b431cf803ac7d400b09cff2b06ac1a96ae87d64841
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded links indicate an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://bk-plus.at/userfiles/files/kofirakoli.pdf In PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c202b6b9268---niliwezo.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8c02b3064---52990590963.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog//file/goteg.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f820989378---lukiro.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160933fa5c5a9b---80523381375.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210701175153.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/8466933495.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/45f51fa7f1fd0ea06d0be8ea51bb757c/87079043298.pdfIn PDF document text
    • https://monyetjoget.com/contents//files/37416372299.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/wuzuxirijanijadajumaka.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/4f9f6ebab8ae1080956b53c2fbd87156/18263299639.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/10237956257.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161203e6d64018---lolekuraxajanezajos.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/40484219089.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f12a6639f---xovegowivinuwiwuja.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/7b43b17cf39b52b53066e8c5a53ffed8/fadupepudupun.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/b4ea26b6b58e858b402a22fba0dbc1d3/lizixufar.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/pefaluvuroji.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/80231734278.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/95o1qb1js77aire42p0j60v453/gitulanufinubekadadomizib.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/36318069385.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/dfa9f17a5975517b0189789cfd09559c/73818142704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=31+days+to+a+clutter+free+life+pdfPDF 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_off0000e8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001010a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 10852 bytes
SHA-256: 24813d97ca981ad9f7625a5db1871a7d4b49f2e062879e9ce4a481fd3fabfdb2
font_02_sfnt_off00011a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4D 17676 bytes
SHA-256: 34437927da6a8e699491f2912d68b7d9292e98e3d45003196f5e5aa5e04fd86a

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