Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f6124550a42f22…

MALICIOUS

PDF

82.8 KB Created: 2021-09-20 03:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dfd98321a4bda8d36df6e67792ae642a SHA-1: 06108cf309ccdb1a3bf10ef3f7a3d525dce345f1 SHA-256: 77f6124550a42f22f6ff58cc213ee72a9d03a049b3b2c35059cf389ec0c88b96
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of 'utm_term=idle+miner+tycoon+download' in one URL suggests a potential lure related to cryptocurrency mining.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://cructi.ru/uplcv?utm_term=idle+miner+tycoon+download PDF link annotation
    • https://senfina.top/uploads/files/75546778864.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc59fe2073---98866004049.pdfIn PDF document text
    • http://korytnica.net/data/files/junufepobufebusagunopuli.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210918_ADEC35871A11BEAA.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/69844254525.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/wokafi.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/vaxemodunimipulelaxogegug.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/21578307217.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/sumigigexazarejin.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/kokodib.pdfIn PDF document text
    • http://ux-school.ru/files/files/fipog.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/papelokitusilefunera.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/52160615350.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613246d6a7d81---33388991674.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/venusowitusofosijojenob.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/pulujenufadeke.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134037888011---11843826306.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/95325289171.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/notemug.pdfIn PDF document text
    • http://turatabor.hu/media/81258264863.pdfIn PDF document text
    • https://krainaogrodow.eu/zdjecia/fck/file/923020453.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132588213ea5---82773045025.pdfIn PDF document text
    • http://ore-processing.ru/d/files/zopipedonidometutisipum.pdfIn PDF document text
    • http://quantri.thaisonpalacehotel.com/upload/files/busomexefexevepidugi.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_off0000d965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD965 19656 bytes
SHA-256: d5af34276edb45913e8cc5491198f406eeda9bfe398ade9d798e8ca8ae63eb40
font_01_sfnt_off00010dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C3 10516 bytes
SHA-256: 4cc9bcd37a4e3c2e3cd67b6cdbb86ca33317955cb0ad27c758a4ef044e974c0c

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