Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba17e7f688bc023…

MALICIOUS

PDF

87.8 KB Created: 2021-08-26 20:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 316352daea66df22d85cc51bb123ab1e SHA-1: 2384af861fbdcae53fabbf0f34fc300f11bc1238 SHA-256: 3ba17e7f688bc0237e9da9a0693099e2ab24d2971e9f2d5748809e119e2b70fd
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics reveal that the document functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or malware distribution. While no scripts were extracted, the structure and URL patterns strongly suggest an attempt to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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 http://edallyshop.com/upload/files/36240554784.pdf In PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/godakujumiguxu.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/novegetuvedeguzelup.pdfIn PDF document text
    • http://karpatskiles.ru/store/file/tofajebemabexezujeguloxe.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4991ebbb03---46844948685.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d464753fd8---lidekibov.pdfIn PDF document text
    • https://panama4d.com/contents/files/lelitosewinelividodo.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/161218dde430eb---kabogubilanofedazuredigum.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d70f20d19d---86364446725.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf4e000410---5209148413.pdfIn PDF document text
    • https://thietbixaydungcantho.com/canthomobile2/public/images/sanpham/files/suzogok.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/df59c3d161cdf531995bbbe80b59e8a4/69624144483.pdfIn PDF document text
    • http://cmtsport.com/pliki/73856742869.pdfIn PDF document text
    • http://gardatrans.com/content/Files/1894418515.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/5903742735.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/d215a19de1f5802f33dc7f6e08050546/tutalemefajarololal.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/ziwopob.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/83941392416.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/tasedisawifofulojunino.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6a90d5847---bevadopa.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/94672648471.pdfIn PDF document text
    • http://bvsaigonbinhduong.vn/uploads/files/50120183592.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/l0mmrh64tppk65lo7st0b473o4/karib.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/72cb30309c393b8a0667021c067f4e29/14555327460.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/96373630950.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f44edc264d---36404958798.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=american+blue+nosePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/5c1f0b60b2562cc08a5896cd9635d50f/90469649613.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_off0000f4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A7 16800 bytes
SHA-256: bdb3b24b0987421bf4e925caeb10c9fa16b49541b68154b078a9b950e61047ce
font_01_sfnt_off00012091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12091 10512 bytes
SHA-256: 8e739d47bc09a99b8974963a5eaf69ab1c1ec2a6aa7b11fc0b6bc762eb120a71
font_02_sfnt_off00013875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13875 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1