Malicious PDF — malware analysis report

Static analysis result for SHA-256 29dbf15e6f62d42a…

MALICIOUS

PDF

82.6 KB Created: 2021-09-02 11:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 476d450cb3983c5ff25f46a4ebd0b51d SHA-1: e5927e2769e4ff87a18b6339f591c48b298e63a1 SHA-256: 29dbf15e6f62d42a301914f7586cbd7690060ed00f55371c3bdec94fe0ca66b4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The document body is unreadable, but the presence of numerous embedded URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://solamsys.com/userData/board/file/gonuzezo.pdf In PDF document text
    • http://candientuvibra.com/images/file/rarabafanovevonedikunexo.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e5bd861fb---xesitulakalorajafijadi.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/fizatelomamomamedubagifi.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f152347961---domijefosopaxed.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/98824808517.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/9747e015a75e5849b8f991c993a56a70/53926615456.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/tasokukapawixumiju.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e7n6no5b33iqgo7a72et68mcfn/tinikivokezavaloxa.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610c2e00cffc3---linezatutojudok.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/b41a3fbe3ed9b55691d9b1e283e7ad65/buxivirafupuxotevezeti.pdfIn PDF document text
    • http://webcertain.asia/contentupload/fckeditorUploads/organization_/file/50257750755.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/vogokasenetafozajakibilo.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c84f97237---32777131716.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/32900496117.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/kapapevoronewomilomipanot.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c4482951e59---52478222155.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087071db9930---ladorinitukuwedivosusadem.pdfIn PDF document text
    • https://stauber.lt/images/files/lebowepop.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/a4893ae24191cced1cd8b58a7533ca24/64080310927.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/d1a47e4d41daff36fa87d9e625dc9a38/fajotasosojezizel.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/51098985731.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=el+moasser+math+2nd+prep+first+term+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD085 10868 bytes
SHA-256: 13545f22504ab92c23a919b80f410945a55aa37f005490965f9d726144814a97
font_01_sfnt_off0000e96a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96A 22940 bytes
SHA-256: 35322c5d95d82901c1fbfb70d23d365dcee519da512e0a3fc3ff7789ee41bf56
font_02_sfnt_off00012454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12454 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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