Malicious PDF — malware analysis report

Static analysis result for SHA-256 48013fccb7da2fb0…

MALICIOUS

PDF

83.5 KB Created: 2021-09-12 13:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 277900727d48c1260b5dcab5005d9a3e SHA-1: 174b4f068e94ad8426781cf4541d23e3f59b2334 SHA-256: 48013fccb7da2fb0619b7ad2ee821043081ec7a5028da4e33305ccbe395354f4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The presence of numerous embedded URLs pointing to disposable hosting, combined with the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic, indicates a phishing or scam attempt. The document likely serves as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f419a3ca4b---lafazisalopoz.pdf In PDF document text
    • http://chemicalengineers.ie/images/milegalosoledotawizitejik.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/51785850133.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/gekemipiruwikos.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210909_E7C14BD2D667E81F.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af66665101---sivejowamofaneronupozuxet.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/34273036971.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/pavanamepedogosi.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/21994552725.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/mibipuruwomavejukimuke.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/90970241825.pdfIn PDF document text
    • http://sbairs.com/datas/files/jusekebebikotasen.pdfIn PDF document text
    • http://wsm.hk/images/files/wuwurojolowabisukoxasa.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/wawesemomix.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/18475335767.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/burerujadaxola.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/repaxagobelabupinupora.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/89495528210.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/97262020048.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/55492189776.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/67916945567.pdfIn PDF document text
    • https://osakadentalcare.com/contents/files/podolesapokuwuxike.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/10273690502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=vidmate+status+app+2020PDF 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_off0000e26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26D 17964 bytes
SHA-256: da4f82d12d2fe8929742505bb5d7648db350bd461c2d49400788620b9efc7199
font_01_sfnt_off000110ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EC 10496 bytes
SHA-256: f6ea88fd361ae2a60f493a304c3aa0e41f3842bbd7ac0e11f1545d078c4eef53
font_02_sfnt_off000128e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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