Malicious PDF — malware analysis report

Static analysis result for SHA-256 583211d0d54055ab…

MALICIOUS

PDF

108.0 KB Created: 2021-09-13 23:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1290e6026e380e272f4adffd48db996a SHA-1: 28b4541f9ded85bf16369cda189e233456b62f6d SHA-256: 583211d0d54055ab67e09be7f5b46d405065809a5ff605d55514fe4e47642cb1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, some of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to host malicious content. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document's intent is to trick the user into calling a phone number for fraudulent purposes. While no scripts were directly extracted, the presence of multiple malicious URLs and the callback lure heuristic point to a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

Heuristics 8

  • 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.
  • 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 https://alsultantrading.ae/userfiles/files/35565220978.pdf In PDF document text
    • http://bn-biz.com/userData/board/file/44342704162.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/55700249146.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/ludimeromijora.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/21004499227.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/rigutexopotibilude.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/lurun.pdfIn PDF document text
    • http://abwrva.com/uploads/files/63242116658.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/sorejafafujulojaxesegubor.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/tm9uohe371l47jodurcpj85i06/17102483630.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/sasevajapulipuvemufi.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/3463a644f67d0a2dd7247549635fc313/48588668261.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/14446891101.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50832792207.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/jilikifikasekusura.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///28267487085.pdfIn PDF document text
    • http://ingore.cn/upload/files/mamibelufavagobukotamisu.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/39355139966.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/letunofowumojijusekometiw.pdfIn PDF document text
    • http://yoron.net/up/files/73092318719.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/23654709962.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-7/20210907010747115797.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e02829d1b3---7282349577.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/65713700885.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613edc0e05516---tibixomuwimewag.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/tuwalisawoboside.pdfPDF link annotation
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tap+tap+revenge+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_off00013c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C34 21060 bytes
SHA-256: 8f796a89ecee86388e3ea33d34211a88feb9df6305d9b15bb1181c8750c750d2
font_01_sfnt_off0001728f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1728F 10384 bytes
SHA-256: 62fbb1aaa3a573c8575be9af0cb82cb2ad8e6e2eaed8891a284ca03a8b6dc71c
font_02_sfnt_off000189fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1