Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ac4954c7251d12…

MALICIOUS

PDF

106.0 KB Created: 2021-09-04 09:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f97b54fbc81e94158cc413003c20dde6 SHA-1: e9ddbb6fb614a582c010baf0b82c7397ceffe8b5 SHA-256: 27ac4954c7251d129d8486f6dfc79532b9dfaf1e76da810d550730c6a7b3f58b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL findings are sufficient to infer a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://thesprotia.gr/uploads/file/97839586057.pdf In PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/dkbcole89h74s8indh7j7uc2f5/89606140974.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d38292acf5---fibugifuguserujas.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/72841296454.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbc3bd0c2d---48006670211.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/30903837149.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/pofifetaf.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/60e16b9490ebc1b80f460bb4242f1ea5/53942858146.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/5208be9b264f54d364adac545633454e/56871262698.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/jawikufibe.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/rivabinotepowazen.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/27046090963.pdfIn PDF document text
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/12593925700.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f32e06e1b4---suvesifisorasukoradineje.pdfIn PDF document text
    • http://schokobrunnen.com/idata/vonoxujezogoxazapu.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/11758567142.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a5cc8df5a---7443122661.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210710_88AA6C65A199D39A.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60B590E2D8ED4.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/45dad1b15d1413727094f242f07e38e2/kikesavobena.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-8///2021817948488213.pdfIn PDF document text
    • http://incucinaconalberta.com/userfiles/files/duvoraf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=concordance+greek+new+testament+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 16548 bytes
SHA-256: 60d0b8c50fda435fa8947e7fea1df87f5364c1d5ec314de2fdaece9cb1bce172
font_01_sfnt_off00011c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7F 28012 bytes
SHA-256: 643adcb45f6d9231f884c50b92f2be1ba1e617275a12353363bbbc61d9ecee4b
font_02_sfnt_off00015f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001779f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1779F 1804 bytes
SHA-256: 3e0df04775994f06af00dd43b182878e5699af55e11d9568351e5f77a1858c75
font_04_sfnt_off00018027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18027 11036 bytes
SHA-256: ea6ac7216c15739959e15b97c5bb28d3ab45ad259f68542e8d42c47cdf181850

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