Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba9ec491a0ceb6e…

MALICIOUS

PDF

85.9 KB Created: 2021-09-13 23:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 91697f37241c7022e6399af5ff19464b SHA-1: fb460ec2b6e5f8c693f1dacf49dc697097a41810 SHA-256: 0ba9ec491a0ceb6e5715eeb7c6c87772d34cfe7ba4333d6e9813b4f6d31405ae
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://jingmingtai.com/filespath/files/20210906185920.pdf In PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139a168b1dce---13043116962.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/7203407554.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/julegapufitefonem.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/sewes.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/mowikobuzexewuw.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/86476546995.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dee7718ec0---rimitasotomato.pdfIn PDF document text
    • http://naviway.su/upload/files/11874146387.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/rewibinoj.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/70151110972.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/kodudona.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be5476041c---88920413179.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135fd5c3102e---16124978944.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/79061353181.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/loginelafir.pdfIn PDF document text
    • http://congluc.com/upload/files/63936340352.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/11782335633.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/zusawuwizurutodar.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/sal1fmu9tngerda03qe358ca80/41410064434.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/86435759858.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/sujuxelukegu.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/molukazedekotimuzuluzamu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=acrimony+full+movie+free+download+mp4PDF 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_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10257 17696 bytes
SHA-256: 66de906ee618e45dcb98f2b942f0a1473f082f3dff2ac86b7db87a469d1fbce9
font_02_sfnt_off00012ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFD 10940 bytes
SHA-256: 9e2de76e0e10b360c68da2dcbf5fca8e084ea094d435727bbc25c3843e44fd17