Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e70c658df822967…

MALICIOUS

PDF

86.3 KB Created: 2021-07-05 01:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8174dbe2681b70a8e26426ba2597dd9 SHA-1: d67d1644085e12eafcc863e323b5f7a5ca9f005d SHA-256: 7e70c658df8229672d59829dd8cdb025f4e4e942835e126fda0942391a9863ab
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains an exploit. The heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. These links are designed to trick users into downloading further malicious content, masquerading as legitimate software updates.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160876516519d3---70610233581.pdf
    • http://www.radanhorse.com/resource/files/juxakifuzesupitobefikopof.pdf
    • http://automsystem.com/UploadFile/file/20210618201951839.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5b278bd51---tefovevi.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/76678601953.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bc5282ecb---lawupopexuwurasiseza.pdf
    • http://driver-jazda.pl/upload/file/23623436807.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608e72a36a5d7---resunamixoxiwilasomodi.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/1d8968bc1e594b5246cf2b7abe9dcb83/xakegivugatatagu.pdf
    • https://aristonails.com/articles_files/files/zuvasiwopekotedovejozi.pdf
    • https://balajitutorial.com/admin/userfiles/file/43739969561.pdf
    • https://bestcoloringpages.com/userfiles/file/fajiduvimukelizite.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c66af07475a---69947332409.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/72a013f2a0900fa1467a6a8448f26580/fesugonerosoromumupega.pdf
    • http://screen.by/images/file/1782970832.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/5qqm1ep4kkk55it5vkd6om9p8l/sogozinawevev.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/0cs8r9917bulb055s8vrcj9p16/miruwovenovulawoto.pdf
    • http://jyotiacademicpress.org/uploads/file/biranaka.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607efa17d5654---tiwejonitabute.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec7c226e60---lawog.pdf
    • http://presssimayeshahr.ir/pic/file/32761248668.pdf
    • http://strahovka66.ru/userfiles/file/juzuri.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ec9d967c5---metotipekejivufagatanizos.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=download+latest+version+of+outlook
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee00.bin
9ef2c6e929046131c0248085a1e15dc26a631462fd2100a44acc9b6ff8ed6836
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE00 17292 bytes
font_01_sfnt_off00011af4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF4 16792 bytes
font_02_sfnt_off0001330b.bin
ac40e7e85f3c30c60ccaf200cc241add4d3079096e4a71e04c11c169cdd3c0d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1330B 10692 bytes