Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc179958d5fc194…

MALICIOUS

PDF

92.7 KB Created: 2021-08-17 12:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bd664736d9347b3568787415fda865d5 SHA-1: 8dfeae2ee81512543b3edc0fe817fd659a5b1752 SHA-256: 2cc179958d5fc194b8f2ce75e6bac66f8403b03ade035e8acb7c2f3f8395e01c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains a link farm pointing to multiple PDF files hosted on potentially compromised websites, suggesting it's used to redirect users to malicious content or phishing pages. The presence of external URIs and link farms indicates an attempt to distribute or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://airflow-skateboards.com/userfiles/files/92029964221.pdf In PDF document text
    • http://villalapinetafavignana.it/userfiles/files/13742360172.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/kupozarekanupe.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcccd1c58a---notib.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982c0e7ae23---xajonu.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/j2hl96a9t96dfs0cb1ip72mj5k/petokorofaxunofotabimik.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/a2dd5876f69df71e218221c61e61203c/36810355490.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/42839903185.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/6847abe3430dfc8ffb767d0421c7db93/kexakisemojilanuzewova.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/sinexogokibo.pdfIn PDF document text
    • http://shepardfarm.com/clients/877021/File/febususugegonizafi.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be3fc14aae5---mupevozino.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53cfae211e---96737356144.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210509181433.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75221570415.pdfIn PDF document text
    • http://didula.ru/img/file/4324685729.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/31414963889.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/11261246500.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/e68sn1udrv7qsv7rscae4jsnl6/55222479938.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080bedd78b97---34925486734.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/mitosotisimapivib.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f51a0d4da3---bowisirawidudok.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/67557073036.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=totalmente+diva+cap%C3%ADtulos+completos+en+espa%C3%B1ol+latino+cap%C3%ADtulo+22PDF 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_off0000fea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 19836 bytes
SHA-256: 5e6e234839a425a0fa66c8568475183d7f73313ed973445709fb66d05bb048de
font_01_sfnt_off00012f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14752 11092 bytes
SHA-256: 57b677531f2decb7f41e5d9262ce6f8cfa9bb1eb3557d7bc8a89dd6ae5127aa8