Malicious PDF — malware analysis report

Static analysis result for SHA-256 e076c84e0a770d90…

MALICIOUS

PDF

83.8 KB Created: 2021-09-17 03:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b8f0f3dd451e215024bf4a427492d93e SHA-1: a9b18bf492c63195ba84e62fc1a8f278da994551 SHA-256: e076c84e0a770d9046cad29c1d10462d7bee6d3fb06e7b84fda3bac58c6a88f5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. No scripts were extracted, but the presence of external links and the overall structure point towards a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132102cf153d---81448900108.pdf In PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/28461173469.pdfIn PDF document text
    • http://pferdplus.at/sites/pferdplus.at/files/file/36579071664.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/kujejoxiba.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/16683685460.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/75610520132.pdfIn PDF document text
    • http://heizler.hu/files/file/jepajufu.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/l94urc6a7nh3g4agrgg3in9ecd/44873415890.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/97865184370.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/vizokux.pdfIn PDF document text
    • http://glassick.com/userfiles/file/78885895107.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/33554061993.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/gibarexokorigaliru.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/bozebaxexu.pdfIn PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/sobodo.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/24860311321.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/sanalab.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613104aa0c2ac---12640754379.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210905085838702.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/sobibimuzumuwipagofalus.pdfIn PDF document text
    • http://villkasz.hu/editor_up/94608310350.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/120511664ae45549067ac1c72e42fdff/busavusotoniduvizetojin.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/famupefa.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109011449203017.pdfIn PDF document text
    • http://japhina.com/upload/file/5699752510.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/faxaruguzusifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+save+word+file+as+pdf+in+windows+10PDF 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_off0000e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 10808 bytes
SHA-256: 080709b314f2accd8828a46758f627d9da4bd4bf0fe19a68add2e50e6109c35f
font_01_sfnt_off0000faac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 18048 bytes
SHA-256: 87e8b10a938c2eb768344077d1bdd93e8abcc038c3d65dab5c357515bca2c97f
font_02_sfnt_off00012990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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