Malicious PDF — malware analysis report

Static analysis result for SHA-256 8430ebcee2a5c4c4…

MALICIOUS

PDF

77.9 KB Created: 2021-06-30 04:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d5feb9acf6a7f365463d62a3a9682743 SHA-1: e17c4df19ce8906c493e6e72d70923bce96c70e3 SHA-256: 8430ebcee2a5c4c48309b1185cded6e20fce270016b73efdb1b6fd0d2e68d6c4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Numerous heuristics point to the document functioning as a link farm, directing users to compromised WordPress sites and potentially malicious IP addresses. The presence of embedded URLs and the structure of the document suggest it is designed to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://pistant.ru/uplcv?utm_term=thermomixer+r+manual PDF link annotation
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6cd9668131---tagudetis.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210627_5E4C257ADEE5B533.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931a177ebf8---xojapivo.pdfPDF link annotation
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/65065fe895acf84d6c53f9ea8d589df9/birezagudetasogisug.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e84a240628---40592421162.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a3f07ebd3---zowexuvovije.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1622760277127091324.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa28b4805a3---36116455189.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/15689387207.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/futinevurovokid.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/79239605611.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcee8265b8---gebomifago.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/7so65lq2vb589dcpn2qgq48gna/nofisegivorefejo.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609127c13120d---raxusa.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098b4738e342---68162031084.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/66772976003.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4277bc67b---xonodoxuvanufil.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b37acc674---42065840697.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/nurarujurodebu.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608412c0df03f---74888181589.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/12877792644.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/c3a707378e91f98f3f8458862f6d1de1/97731576108.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/90020124683.pdfIn PDF document text
    • https://sca-kc.com/scauserfiles/files/95317792526.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1dc8744ce---luridejumodomemavagi.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_off0000cdc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D3 17420 bytes
SHA-256: 0c127a3964858b58503e4175168791e7ac90b64396a756a9a1c0e1c283c432ce
font_02_sfnt_off0001138b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138B 10272 bytes
SHA-256: 52eb6a7ba9027b1018eb4731aaa331c6189b452d4902a17db1d4a9e1b159dd1b

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