Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a74df9e7932ccc…

MALICIOUS

PDF

63.5 KB Created: 2021-09-01 21:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3473685eeb69be1d85383ed18784c3b2 SHA-1: 1909e95f97565981572b3bd4fa03cd9d6b238af4 SHA-256: 49a74df9e7932ccc6f88cf97cf2f1deb65a06bd0edb512face4a4503d857bc0f
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9193

Heuristics 5

  • 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
  • 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://queure.ru/uplcv?utm_term=how+to+get+tranq+arrows+in+ark PDF link annotation
    • http://custom-mugs-factory.com/uploadfile/files/37823730466.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/relarinewo.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/legunexuzixaxa.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608751a092c12---fegotufunijokor.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/babovenum.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/940341402.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16085997335db3---90291453408.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/54956339029.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/5bd8a2fde0dd0dcc8f80318c5834cebe/xinixiwaze.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/27416473360.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202108291012083235.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e679d0a02d---zanomobakarifokan.pdfIn PDF document text
    • https://fotinepmuveszeti.hu/kovagoors/uploads/files/8563509271.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/gigorebafufomosekof.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/sifox.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072689fa1b0b---molataduxi.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb94806a213---79705883915.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/susexomexuverubopafavumew.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/fufonuwinesitoroza.pdfIn PDF document text
    • https://motoralbini.it/files/file/wuzopokuz.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5449a5ec---84814733336.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/31827621537.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/16cf4c733029d0f72dee798234de70b5/sikonagibopulov.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE244 10552 bytes
SHA-256: 29fee5c7f022b2b60dc663ca85fcc440aa08a64ca9359737dc5e533795d950cf

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