Malicious PDF — malware analysis report

Static analysis result for SHA-256 a41df785046f0252…

MALICIOUS

PDF

83.1 KB Created: 2021-10-05 19:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 14697447c6cfaa6ea3fa91a185da8537 SHA-1: 570ec6b297898a9ede2d1f6747875cbfa2113494 SHA-256: a41df785046f0252421bf6e9c948dcecade8258fab9d795e9800fd1bb7d9a5f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous URLs, many pointing to WordPress uploads or similar structures, suggests an attempt to distribute malicious content or conduct phishing operations.

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://ketchas.ru/uplcv?utm_term=rules+present+perfect+continuous+tense PDF link annotation
    • https://ajwatravel.com/wheelmarine/userfiles/file/satefumudifenojejolus.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/bfcdd8be268a11ba09e0097c5ac5224b/60637073166.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/xedavutonaxopafewelixoba.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/52787423971.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/26914761339.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/24902200036.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/697fdc60c6920419df2f1aa01952d0dd/nirarulobujenur.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/dezagogikakepiwux.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/8265548463.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614ec15920780---57689901186.pdfIn PDF document text
    • http://zzquansu.cn/d/files/fexoxegotasuxipibejo.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/kogetilozusopebus.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/jipame.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/xigugaso.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/zobusonadula.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/36168708280.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/fegepot.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/91524687324.pdfIn PDF document text
    • http://asfalon.com/__files/file/99050766075.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/77479277714.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/19579697205.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/87354495639.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/zogajabowezunegegimakol.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/61510885339.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/reseratudugar.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_off0000e064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 17684 bytes
SHA-256: a033192e4977f7bbad424d7b83766ca08ad881ae2d298d67dcf959d48ac8d172
font_02_sfnt_off00012658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12658 10456 bytes
SHA-256: 34b8f0239edef494726ff0542cf44fc8e8ce359ed2efcc6f274955e14d21a86d

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