Malicious PDF — malware analysis report

Static analysis result for SHA-256 114180c96bf1cdef…

MALICIOUS

PDF

97.6 KB Created: 2021-09-15 09:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f6010952e28b2e3cab878cefa20166b4 SHA-1: 02c6d6969d87a2c53a18ef7183fca7199f6f8d8a SHA-256: 114180c96bf1cdefd33e177a10810ea9a54995db229fcd7741663203120bfb5c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised websites or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a PDF_RANDOM_URL_LINK heuristic firing indicates a link to an algorithmically generated URL, likely for obfuscation. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm the malicious nature of the file, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs and the nature of the heuristics point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://pixomot.ru/uplcv?utm_term=pokemon+black+version+2+nds+rom PDF link annotation
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c08773372---lojekomubasimu.pdfIn PDF document text
    • http://thoitranglani.com/upload/files/mujagebi.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/82300038846.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/88615440935.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d19b6865c3---mirejigupola.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/53998780824.pdfIn PDF document text
    • https://jechrina.gr/FCKeditor/userimages/file/kiduxa.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/48190835882.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/lenimid.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/tisik.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/19694950509.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/66708808186.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/49106616053.pdfIn PDF document text
    • http://hzqzg.com/d/files/88535267577.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/89929122645.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a85383d5c---gaterudaxa.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/wufuduzagawotebifat.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/xisag.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/45759842153.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/88739071646.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/87767461936.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/vonukowisarota.pdfIn PDF document text
    • 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_off00011312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11312 20024 bytes
SHA-256: 17685f86fd0f2eb86ff9f30ad77be1cdf96a225ca7d029db46fee0b3cf4c4ad6
font_01_sfnt_off000147bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD4 10852 bytes
SHA-256: 61fd1be46e9310ff53056bf0790ff94915c817dcff7a8347af866de01f9b357b

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