Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a1072b7a773f43…

MALICIOUS

PDF

89.2 KB Created: 2021-09-06 20:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7db3202a36268c0903cbe9855f394ce8 SHA-1: 5433b0de46c20495659532f08a09ff33c23bbaba SHA-256: f1a1072b7a773f4377b6d1bc3e1697dd1bc590d5fc3bb9f64241e309653166db
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised websites and disposable hosting, indicating a link farm designed to lead 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 patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://titadoorbinhduong.com/upload/files/27180214551.pdf In PDF document text
    • http://giaexploring.it/userfiles/files/sirekojokeka.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210901081825.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f5dfe8c16---jelotagubirev.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/farujulide.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608345b369b33---50891167769.pdfIn PDF document text
    • https://mimpiindah88.com/contents//files/20819350938.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610aeef657ba1---ponereduwirasiramu.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/50378d7f0b1b17c29dc389231fa5d463/74284049772.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c7d0c0a72---jokikogegaduzoluvasupiji.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/48755217582.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/15977039278.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce98f1bb03a---30296186182.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607aca41e6291---14542243271.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f7b85e0a42eec648c1b056a477a71138/82875385287.pdfIn PDF document text
    • https://newoptic.mn/uploads/files/4825268961.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607325dee59ea---64151599695.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/tinabarejatikivupoweva.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9ac432374---ludawoxu.pdfIn PDF document text
    • https://efnnma.org/files/file/81315344054.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/78764822240.pdfIn PDF document text
    • https://anfauglir.com/images/file/falitipebozugedesavas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=copy+reading+symbols+in+campus+journalism+pdfPDF 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_off0000ef24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001073b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073B 11380 bytes
SHA-256: 52097ce8336e7aaeb0b12822ec97bc65182a495c3b030cd1dc05b5dd9ce5ff21
font_02_sfnt_off0001218a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218A 19876 bytes
SHA-256: 40c1e8f8ba82d68c0dcb315ad9c53beaf3d90c2530ec211a40ada72faffc5a66

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