Malicious PDF — malware analysis report

Static analysis result for SHA-256 7794af449bdd8a24…

MALICIOUS

PDF

82.9 KB Created: 2021-06-28 16:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4799a123983465cbd183396b0d26975 SHA-1: 0138ddae0365c7bda7e6cf393b708b66c68a1adb SHA-256: 7794af449bdd8a2476a302fd3a241993ec88bd6a38b70ae36a3478ea1c398068
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to redirect users to malicious content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/8tqu98o7j03sreud0991dvg1o7/xogafufisalugenuru.pdf
    • http://studioingegneramato.com/userfiles/files/simusakofepekukapexewuma.pdf
    • http://rollfactorytogo.com/uploads/files/24978485986.pdf
    • https://taevlingar.se/images/pages/file/donuvatujenizenivarigemis.pdf
    • https://mecaniquekd.ca/upload/file/19265045101.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160837c46d7e11---20880046686.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d430ce2d28---mopor.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c11305d4088---lolozotukurevolu.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/098jmej2gaueb1qtrgomimddmn/51764757461.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/fcfc0841d2f8bc8fab9e1a45a7d23978/36249467845.pdf
    • https://hogies.com/includes/template/uploads/file/nowubiwaxevu.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/67522726b32ca48f15842b0e52826828/97628386159.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eedd880fdf---3169731494.pdf
    • http://seanmore.com/userData/board/file/56814083524.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e248333bd---86345224955.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0eecd95ff5c214afd3e4580d634b866c/74179893471.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c86c0378a8b---975897793.pdf
    • http://maxtarget.by/ckfinder/userfiles/files/67098790839.pdf
    • http://domholidays.com/userfiles/file/ladexudepuwida.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/jd0qgb28rg86srkbbs579c15dj/getaxesi.pdf
    • https://hophamthaibinh.com/upload/files/62071293049.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/5dbc24df51cadb6c51916465262aa0d8/10526212633.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=3000+dinar+in+rupees
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC77 16792 bytes
font_01_sfnt_off0000e488.bin
0cad94ea7c8ba6740a74f5a4b2ac48d27f66a300b32839414f2b8a05dedfaf1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE488 16260 bytes
font_02_sfnt_off0000fa96.bin
5900fac9fdd020d8a89641f823d6053fde08cc73c0251a8f72a6c7d9b1136de8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA96 10416 bytes
font_03_sfnt_off00011239.bin
2bcf39982d92aae057643e28813d5af06e0f2911e95c6a54faf341a496f62eb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11239 16812 bytes