Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a4dadb829aeb87…

MALICIOUS

PDF

97.6 KB Created: 2021-09-02 07:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c7faa0155996666bc034114a734400b8 SHA-1: 4c17b4a9b9d4b0aca9e62dba6eda5e75ed4d5497 SHA-256: f1a4dadb829aeb87a812b439917a6876cb3dd7d3e1b14bcd26b2df941b64f286
204 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The presence of a 'Payment redirection / bank-detail change lure' heuristic strongly suggests a phishing attempt targeting financial information. The document contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a likely phishing infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://i-p-p-c.com/ckfinder/userfiles/files/zetimogaxebabimagesomudu.pdf In PDF document text
    • http://tubietelbar.hu/uploadfile/nobolawa.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f17bb80e6---54490743095.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/wapugenaxukojobefani.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/27mjvhuahm4dcnqo6gsvkbdpg5/5892276063.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/9462deda351d7e0220fa301713fbb2fe/xomenanujozufanajox.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/161027cf8a9958---vorezufagosivigojutobuvu.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14283a599---xafijigagugipamudeko.pdfIn PDF document text
    • http://kasargod.net/uploads/file/xipepuripulonivebuxefefel.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/momedinipitobobopotekarer.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/kopesapiwumoj.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6161768228---jepamofotewukesinufujoj.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/vqmkckhe19dk9d3tr71e60f4f4/morigerotixuvug.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/mimenutenivi.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/vesofofutojivido.pdfIn PDF document text
    • http://goref.ru/files/file/lizedo.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/070690fb1ffbae5f9f0ea071d08ba9a8/64358997514.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/22963622249.pdfIn PDF document text
    • https://csodamalom.hu/files/files/91204721733.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/ffarltba3l7dtlqduq1vqtkqqn/nakikokawa.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/1rse9ol23bntvuragl45kqlkd9/mozufexaniberizekidigenum.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/vakatanekewamejofenosonug.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/74018427281.pdfIn PDF document text
    • http://lhjmfamily.com/clients/5/5d/5d8645f74963a96e1aea25f3b610eff6/File/kakixojorerotix.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/40725886915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=if+you+aim+for+the+starsPDF 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_off00011940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11940 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13157 10492 bytes
SHA-256: d5af75be41d4df562aee6c86a4be423ea76e52dd42cbf907881ccc826c3c6b52
font_02_sfnt_off0001493f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1493F 18216 bytes
SHA-256: ef08168bb0177c380c28b822a96d872001852a85dc56acf3d6d17fa66c4a53a6