Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a04f846dc4cd88c…

MALICIOUS

PDF

75.9 KB Created: 2021-09-29 02:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1b27c9008e0b1db0aa1458bc0a60d01e SHA-1: f79ea09309dd1d56e0e3b0e11d229958d9b37e63 SHA-256: 1a04f846dc4cd88c204a3d49bb8d67b2862e80c6cfd86f2ee6052edbf98922bc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to obscure the true destination. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common social engineering tactic for phishing or scams. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://shriadinathbank.com/uploads/7204952279.pdf In PDF document text
    • http://influences-vegetales.eu/assets/Image/files/18232135743.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1614231eea0cd2---97993303135.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5cca2f827e867ccb4c6eb21376b92fbf/285255467.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/53748133686.pdfIn PDF document text
    • https://tannhatviet.vn/upload/files/femuwewajotazixolobujux.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffba70f71f---remoxotusegukosop.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/xizari.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146eaf48da0d---38358344640.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/97839981585.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/gurizosu.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/pizivuvizatelogovemeku.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mulatixelelelugafukolizeb.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/5c68ddb76dbb6b6925e24b452dd79673/lasevusiwizevuwusuzoje.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109052017226842.pdfIn PDF document text
    • https://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/93039862283.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423f3ab1de7---11272285736.pdfIn PDF document text
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/32619655326.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/fowiponusu.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/fojutiginutel.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/35010925362.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/xutogiw.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/22598758614.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=reproducir+iso+en+androidPDF 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_off0000bcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC7 10508 bytes
SHA-256: 42d870424ba3086d2e5f7f0ed8e25811593ce3c2b96b448b93d95a3d2902323c
font_01_sfnt_off0000d4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BB 20268 bytes
SHA-256: b984f43b6ea5505806d23a280bd496f5340b04cf9bd6d8411245742f64f0afe4
font_02_sfnt_off000109d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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