Malicious PDF — malware analysis report

Static analysis result for SHA-256 d093012f703570cf…

MALICIOUS

PDF

75.9 KB Created: 2021-09-08 13:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: db6df4e3162eded3cce82929500e2fc4 SHA-1: ec1309d399ce095438562352719de548596989b4 SHA-256: d093012f703570cf795ac09a1aff52626a2169d35e498bbbe5b043670e0af91a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://lignumweb.com/site/webroot/uploads/files/vigamutujoxegalirirofel.pdf In PDF document text
    • http://12shio5.com/contents/files/vurozixofibigazusejubud.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/fevotiz.pdfIn PDF document text
    • https://groupunsur2.com/contents/files/mojasuwidunozis.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/82290609448.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/30f6dd74c6af98bf9aa95a7a55bd2d2e/wasebizepufuli.pdfIn PDF document text
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/xukivevojupidepuj.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/85082914094.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/ruvemosikureganowe.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/sunitaseto.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/72065085628.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f22b8caf9b---repozosej.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/pasodenubawoxurajanad.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/05bd2bd46e2e6ad565786f5fffedcb05/44067281363.pdfIn PDF document text
    • http://decaiyun.com/upload/file/2109030638576685618xfj44y95s76.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210902115757.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/xugunobevebapume.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109021311463466.pdfIn PDF document text
    • http://canadianrockies.info/files/file/17468999021.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/b4873c51c847c645a8f2f43957880ed7/92297025181.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/38699340329.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/99484092802.pdfIn PDF document text
    • https://zemtechnika.lt/public/site/0files/kuraditavasizofejuli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=american+dj+par+64+led+pro+manualPDF 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_off0000be59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE59 19004 bytes
SHA-256: 7d11865ce4a6b0829fee888313a975a1778693b5cbfc3cd12a8b52a2e9e139d4
font_01_sfnt_off0000efad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAD 10868 bytes
SHA-256: 5579e72e95cf1ae7071293094c43951e5260a813237c319d7279a51781b3cf45
font_02_sfnt_off000108b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1