Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce77d780c7405d3…

MALICIOUS

PDF

83.8 KB Created: 2021-09-07 04:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 87a9e124fa385f1db43ba967c2806b0f SHA-1: d7d35ff3a168ab961d9550a83360bb43d69444be SHA-256: 7ce77d780c7405d3d8e989ee5a122b8b646110d02a6bbf00753bcd154d2e92fe
96 Risk Score

Malware Insights

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

This PDF file contains a link farm with numerous URLs pointing to compromised websites, likely intended to redirect users to malicious content. The ML classifier strongly indicates maliciousness, and the structure suggests it's part of a phishing or malware distribution campaign. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://crewmak.ru/uplcv?utm_term=corvair+parts+manual PDF link annotation
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/7970a08e0ab14cee33eeab2000bd2ea3/rujidasisisolunenowofat.pdfIn PDF document text
    • http://daiichigroup.net/uploads/news_file/62093494363.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/8g6pu7gijbcsqth8chk9mhrujh/subezuj.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b1ebbe0f6---81684204768.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/94824663997.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/farolinezogewepav.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/84983880440.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/715549838ac8c6e292cd0a6f09de9976/81697189338.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/41652003684.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/tojinexipipulorip.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/52969275210.pdfIn PDF document text
    • https://dukupahit.com/contents/files/tubufawedawoziga.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/50623938301.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/6c0164c6983e36447fd6c04b61323f99/86731526311.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed709bc4c6---pazuw.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/mogeverojarinujibud.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b89118b5f9c---4861128736.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/ceb9vha72a232dum8l9ffotb1u/nusomibokuxumewo.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/meremomozilutigujijeri.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf99bcde2---gazepu.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/wurujubimezezonixu.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/73683067934.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/1328574825.pdfIn PDF document text
    • http://dgjst.com/upfile/file/12654722665.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d7620e7dfbc---14323427389.pdfIn PDF document text
    • 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_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 10476 bytes
SHA-256: 3bf974cf8b0f9893dbb4b8d16e8e82c2e8fb7fcc8c1c4f227d40604076b1fedf
font_01_sfnt_off0000f6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED7 18688 bytes
SHA-256: 3589e61d0effe0b492e73f3f75aa3dda7654d502e12fe7f22b86726cb045e01b

Open this report in the interactive analyzer, or submit your own file for analysis.