Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2a0090949ef9c2…

MALICIOUS

PDF

74.1 KB Created: 2021-09-05 08:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fd9bee272ff759edecd82ab3dc3f8ab0 SHA-1: 299ae1dce9395f0a7c2ce5112219060c27592a72 SHA-256: af2a0090949ef9c258c7f1594d35d4f9e50f0d24ec7a214255289851e5dceec5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm or phishing lure. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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 http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606de2635da5e---19745241536.pdf In PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dcadc03dc---tinomasumazixeda.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/molesebuposiwowodike.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700cbf08f91---rujabusilisuna.pdfIn PDF document text
    • http://ping-property.com/user_img/files/3600401560.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/wujuvotuvexusulanerevakod.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad9a1a6a34---2910311679.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/21260948153.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096ddceec998---pizuminarakituw.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/78690526890.pdfIn PDF document text
    • https://amblamy.ee/upload/file/81463002281.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6f22915c4---27298348113.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/gorowogubinojarenuwuko.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/welabuxow.pdfIn PDF document text
    • http://jkohut.pl/file/penomivozom.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/55209753176.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/2eba5355fe9379a1080e2e17cec19e5d/96474173701.pdfIn PDF document text
    • http://profstil.az/userfiles/file/57163348988.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/tufidamufitasozexagofapib.pdfIn PDF document text
    • http://change4best.ru/upload/file/19144746466.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b0e547b83---6441164173.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/30e503a4f9621bcd9a4c8e32b54ab9ea/38995596475.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/mibanamejotosakofo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=intermatic+timer+ej600+manualPDF 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_off0000bddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDB 17364 bytes
SHA-256: 39a349eabe722b73781bac1e7695ab063bcd29531400792de5f8533d43458164
font_01_sfnt_off0000eb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2A 10576 bytes
SHA-256: c14a0a476eb7eb9b4cdea29b899db93f5c0039bbd1bd30bcc37eed6b892ba0cc
font_02_sfnt_off00010346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10346 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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