Malicious PDF — malware analysis report

Static analysis result for SHA-256 7627c129f3563ef3…

MALICIOUS

PDF

79.4 KB Created: 2021-09-07 05:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 47d9ef9f508a2d6dc4f2951b56a41dee SHA-1: fa4b35a51f1dd78950c160381c0157983bcb69f9 SHA-256: 7627c129f3563ef35d7b1eb279e17d593fc090086f5dd4eeb06032be0f3c5529
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous external URIs and link farms pointing to compromised hosting, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://commonwealthsportsawards.com/userfiles/file/17527595064.pdf
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/7769586032.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc7203afb---nukud.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed3aad8e1ee---xoluvotivelezaje.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/757149ee5592278364b034a627b58ebb/90074483061.pdf
    • http://1hozain.ru/files/userfiles/files/gagaropikonubel.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a190caa768728fa724d6c484984fe3a9/11549843181.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608333d152f0d---venifinaduzojigukode.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee1203a95fe---lexewenenozaz.pdf
    • http://alimentosldm.com/userfiles/file/7720953935.pdf
    • https://ddnepal.com/assets/userfiles/files/rawawiduwewavozazozok.pdf
    • https://linkevicius.com/upload/galery/file/tinutemomu.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160814fa068e70---xojabebebofarazo.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81c6eae50---15203529619.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/34bd7fa9c40dc5c6719bdfd17e576931/welupuworatotazarazekeb.pdf
    • http://assistance.uz/images/shared/file/wovipularefitodebi.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acbf6bb780a---vadij.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/f146a2fc1f4aef30f978f5ce24edb037/55254238099.pdf
    • http://galettedesrois.hu/userfiles/file/44981476311.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/a058a1cec09db5d135788de3d8c4d303/88727698775.pdf
    • http://scvumaichiramen.com/uploads/files/kejul.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609090e619098---punavipabomodipax.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/si7g8n5be6jf2nta9uh6jjfecn/dikotoguxejilut.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2accc8fbe3bdbea1777ab125ded41a1b/natojulijojuremidugakadab.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=urdu+adventure+novel+pdf+free+download
    • 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_off0000cb02.bin
1306c42d4d0bd66d4921b99e9ddddb602dacbe9507360b915b0d906717e588fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB02 10492 bytes
font_01_sfnt_off0000e304.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE304 16792 bytes
font_02_sfnt_off0000fb16.bin
fc44720135b1e2e44686e7282026a700b7c3094bd9b53fcd6204c983e7350d62
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 19200 bytes