Malicious PDF — malware analysis report

Static analysis result for SHA-256 3579313227b5d701…

MALICIOUS

PDF

82.2 KB Created: 2021-10-23 04:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 81cb5fcedd1e625d629a15779d19da99 SHA-1: 561ad4e3c0fe80a97d129ae1bfc232b2edface84 SHA-256: 3579313227b5d701e5e78903a87f29ec47ab0b73db0c249af7a9d332a0bd4d29
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://eco-translation.ca/upload/editor/file/zomekizojupitinegonovaz.pdf In PDF document text
    • http://conkheror.com/ckfinder/userfiles/files/47253193893.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/41347703379.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/goxitipe.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/97692988793.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/87123159179.pdfIn PDF document text
    • http://armanetti.com/images/dudozonimakilegadufonawa.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/19855629715.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/4921929940.pdfIn PDF document text
    • http://kdekdyjak.cz/data/pimebepa.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/kj9jcg055j09qubj9doqjo06o3/lufudufubasutotokevo.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/894d8f7e070f17be2818af101779f42b/69021481165.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/luxomodebamobe.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16171d4d222d69---forudazibokimudokavavi.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/fumomi.pdfIn PDF document text
    • https://www.nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/90197451587.pdfIn PDF document text
    • http://df-2.de/images/daten/file/sekelemi.pdfIn PDF document text
    • http://nppgursaraijhansi.in/ckfinder/userfiles/files/79570505066.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/46416014400.pdfIn PDF document text
    • http://gurmanosypsnys.lt/userfiles/file/96174159655.pdfIn PDF document text
    • http://hawaiisushi.iorderfoods.com/uploads/files/fobog.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/6282031055.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/47342149814.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/45723039350.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcd236cea1---78330775682.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/6Zflnl449io/uplcv?utm_term=eggs+and+chicksPDF 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_off0000de6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6B 10228 bytes
SHA-256: 0ce7daa1c8e7e8be57df93303637dd5973b92750502aa33e9ecac7dee83a147d
font_01_sfnt_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 17764 bytes
SHA-256: 02a14226c17c81d28c39b879f3abe4320e590cc1f2f0da1b1cef882e41f1660b
font_02_sfnt_off00012334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12334 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1