Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c17b2fdf38c630…

MALICIOUS

PDF

86.0 KB Created: 2021-09-02 09:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 73a80b0c136286880315104042404015 SHA-1: 045259d554640e0ed97be9db8a6a7dafc48a6d2a SHA-256: d0c17b2fdf38c630699a55078f500450b3c9899d1db5ac3d9bb2ef81288d6191
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=des+moines+county+sheriff%27s+office PDF link annotation
    • https://asfus.net/virgsurv/userfiles/file/xufusixuduguzo.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/rukamene.pdfIn PDF document text
    • http://rem-proekt.com/f/file/21701870751.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d19b6721b8d---xidorepivugoveb.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/48507859881.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f87194bcec---suzebabivolufij.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/81dfcb0be093899a075eb06b5a9121da/22634270483.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088059002dae---81717842874.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/37720954552.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/81l6oar3fvqcb3akqta9iptuh0/72293397717.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/20021048518.pdfIn PDF document text
    • http://universe-micro.com/upload/files/20210727_230157.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/22135769749.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/63791303209.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/pozaxunexo.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/davuvim.pdfIn PDF document text
    • http://arablift.net/userfiles/file/wakid.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/de1566d26ff1bae75785f510a49ca657/jefusifodewekolutev.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/gatibenetapajolirijuz.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd70dbdd5b---kemesimobote.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/ranikibo.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/e884bfbb436b9fc8e9639825cb7d5125/95216910898.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_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 18460 bytes
SHA-256: 82cdf5395bac092b6ad75b14d589fed24106b49d98715ce6453d81c1a59435ef
font_01_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316F 10640 bytes
SHA-256: 6642c6b509b8b4bf4f41ccb966d5ac3d9b9de8b6facc0bd9238696acf0be49cd

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