Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea9c20fc5e12b0a…

MALICIOUS

PDF

75.0 KB Created: 2021-09-16 03:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f6815bc954a84ee4717906edae0b4f28 SHA-1: 4308591292d678e77157c6d23230553d50535a5b SHA-256: eea9c20fc5e12b0a210d9afbe1cea9dabf5d16791bcab2c7411b43bbb108f87b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs, such as http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/524d31ceba7abcc457e2f65b212762dd/30110117014.pdf, are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://nuovojob.com/userfiles/files/kujetaroxibuj.pdf In PDF document text
    • http://4x4autok.hu/userfiles/files/40391379973.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/27c65faad5185e8696a6fb1bf8d15d61/31379165705.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/91355154580.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/rebuvipobubazijobebofusor.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/524d31ceba7abcc457e2f65b212762dd/30110117014.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/43664289114.pdfIn PDF document text
    • http://jobcred.com/rk/jobcred/uploads/image/file/65655179057.pdfIn PDF document text
    • https://petikdaun.com/contents/files/82542872200.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614080c4bff66---kepegujumijasuvoj.pdfIn PDF document text
    • https://demo.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/desuwe.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/rulezetufumuvo.pdfIn PDF document text
    • https://bkairconditioner.cloud4demo.com/uploads/files/kulodefasoxezezegimuravot.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/ludelefozupenu.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/fidinot.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/1429430994.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68420440263.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed04836bc5---64920308184.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/begaragitofim.pdfIn PDF document text
    • https://fivetc.net/uploads/files/mafozazujigebuvule.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/488a582fd60b9f829812de5f94b68394/jazetuwumekux.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/80156070291.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/19365021784.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=an97+android+camera+appPDF 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_off0000c073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC073 10560 bytes
SHA-256: 87d46ff2337e97710593ae4691ba695af668927d5056343873bfe3b67041149d
font_01_sfnt_off0000d892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD892 17668 bytes
SHA-256: c2192ae31bb84083c272901d6e26288f099ec353fb1075937af36e95ba0030ba
font_02_sfnt_off00010646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10646 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1