Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc3e6bd068cf68e…

MALICIOUS

PDF

82.2 KB Created: 2021-07-04 01:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d47fa28db53aa8ab91bbf661c57dbb5 SHA-1: a1416e9cf32b4e2f135685b365ea53cdc34a9ea9 SHA-256: 6cc3e6bd068cf68e533fa3f554ed268a92a1362886b67d0cd57e2b389c319409
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload storage locations and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://chono.mn/uploads/userfiles/files/zozatadevowisalanenewog.pdf
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/71642543525.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/5hjqdt5a0r4lgjq2fuag6qc1gf/18613523394.pdf
    • https://m-isc.com/userfiles/file/japunireligupoxu.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/45525253779.pdf
    • http://ahdongjiu.com/upload_fck/file/2021-6-17/20210617142444316219.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/0fbb53aa63943963c7773f81bd64db51/monujunavoxikin.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2df5b8c787160212d010f183409f10d3/56904396105.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2945adb83---bubaganagibef.pdf
    • https://takipcisec.com/calisma2/files/uploads/46795370344.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a753ae5a22445af4ec561617b759effb/22349900485.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160827b1c0a2fd---fobef.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7fd1f71a---zenufetupevevifopawaviteb.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c3633416a9a574634cbd0d233c840c3f/geviwisopetipuxipit.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2eedc3511f---13056870315.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/fort4sabkh4b3bnre23bddq6nj/mimekowunagekupales.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6936cc658---255604010.pdf
    • https://atcotourismtravel.com/userfiles/file/zezagetu.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/jmbcciqv3t8vrb4l8talofdn9c/44546779357.pdf
    • http://cristal-in.fr/userfiles/file/vidiworupokipakagonite.pdf
    • https://detskeihriska.eu/ckfinder/userfiles/files/54420038919.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=difference+between+microeconomics
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e125.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE125 16792 bytes
font_01_sfnt_off0000f937.bin
b9bb4f926c7a19d6dcc86089131d685574babeb7cfe702ad156b49cefc9fdd55
pdf-font-stream PDF embedded font (sfnt) at offset 0xF937 16304 bytes
font_02_sfnt_off00012384.bin
22e462dc5445bb096cb285c896736643e7937a9c2a5865cfba416f4f6a230845
pdf-font-stream PDF embedded font (sfnt) at offset 0x12384 10516 bytes