Malicious PDF — malware analysis report

Static analysis result for SHA-256 c569dab870f1ec05…

MALICIOUS

PDF

91.0 KB Created: 2021-09-06 15:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5abb89a6c77e4c78d50be50dad24c048 SHA-1: 86c0f27e1553a48cae201453eaa471df899cc77b SHA-256: c569dab870f1ec0550ea7f140b796adac1192cc75d7f522c1c1433cecbe1b0d1
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URIs pointing to various websites, many hosted on compromised CMS uploads. This suggests the PDF is likely used to direct users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 https://synerhu.ru/uplcv?utm_term=bergey%27s+manual+classification+slideshare PDF link annotation
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/89551709055.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/4017f55ada161837e738c3786cb551e7/ziwenogugofifuvak.pdfIn PDF document text
    • http://teifsepahan.com/files/file/jexiterifup.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/7139263106.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161255ad4a4545---78056476334.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/lopate.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160863eda00590---fedegobotigaz.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/49861082299.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/nvbfrm8ekpcvv1vcqnk7hpscr8/pelekasez.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/10614016665.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/88995786789.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210707070554.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16071eefe6f6b5---31902795825.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/7f97b30839a03726562035623479f3ad/20348195224.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/pawepoberobiluv.pdfIn PDF document text
    • http://dienmattroigiatot.com/uploads/files/ravesolanogobojogituzun.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/12852812101.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/66032526610.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/mebozanasigupav.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/xuvosozabetipa.pdfIn PDF document text
    • http://xinyuemu.net/assets/202108/files/20210826011003405091.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e26d6092---sibulesimarilumu.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f8623a3c321---tetajetiposaw.pdfIn PDF document text
    • http://easttbirds88.com/clients/d/d7/d767393c090093bf18db16876c07b5c3/File/40175594150.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fae80cbbf2---dojadegapuripikatubag.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/e0mst7sv8c9dl2l2k8d2984odr/vogorerefidisapaderurazoj.pdfIn PDF document text
    • 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_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 18568 bytes
SHA-256: 631a244b08480fab3f42ff5cfcdaccf1dcb60a0c1c31ce6ad738f8e44ea35e8a
font_01_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 11224 bytes
SHA-256: 6a0a274803dd3a976b31c9deede76790a6264323cdf888f4b14f3b5f07c6a477
font_02_sfnt_off00014634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14634 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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