Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c13dc5ed15312f…

MALICIOUS

PDF

68.6 KB Created: 2021-09-05 12:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 98d71cefd58a8c69c1529a3419ac029e SHA-1: 42d1351e12e30b215d6971b6d229e362b9667028 SHA-256: 02c13dc5ed15312f07583d5d0c5db4ca1726564a777b3e3e2c6ca14f9b8b38c8
196 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical for phishing campaigns, with heuristics indicating it contains clickable links to external resources. Several URLs point to compromised WordPress uploads and disposable hosting, suggesting a distribution network for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for delivering a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/raxofadowiliju.pdf In PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/xotitikebezi.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9e95bae30---pivesejani.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/68336205212.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/97486504556.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/83460287857.pdfIn PDF document text
    • http://rvhifi.cz/files/file/gipasove.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/6936286816.pdfIn PDF document text
    • https://mimpisiluman.com/contents//files/6642592045.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/surinuxojunub.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/telaminugiwowarerudazepi.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/19790030619.pdfPDF link annotation
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/143184c92d2248e41832284cf82123a3/bitazojaxonufapab.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/8a182bf64cec13d85d966c7124267129/fotelisutajo.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16084295f19c03---94304354999.pdfIn PDF document text
    • http://wych123.com/upload/files/migulududelip.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/sofofebajuzalibid.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/povesufotapibominikubu.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/3502219135.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/etc4k0c1aid4tud5ipjt264f06/42130562110.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/pomikeb.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/tipenubujuworowibe.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-10/20210610115938277818.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=eliphas+levi+carti+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_off0000b1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C6 14020 bytes
SHA-256: fbd02797c5c429709b3f2788adcda93b2cef8df0d24320a2ba4e9f2efd0f2a5f
font_01_sfnt_off0000d43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC56 10544 bytes
SHA-256: e570ac38fe8e9f70c2f0dc77543b703f784ae099a281cc03e6a42e899b995ab6