Malicious PDF — malware analysis report

Static analysis result for SHA-256 616818a2660da065…

MALICIOUS

PDF

71.3 KB Created: 2021-09-02 12:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5d464fb64ab666559c08ccb151f83423 SHA-1: 03f1f4d14e1a089ba3a94b936205449e6612123e SHA-256: 616818a2660da065ed1165d878b9f39d33de673983782af24d3f9384200a7c20
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to external PDF files hosted on various domains, some of which appear to be compromised CMS uploads. This suggests the document's primary purpose is to act as a link farm, potentially for SEO manipulation or to distribute further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://sasalidayanisma.org/uploads/file/53006661298.pdf In PDF document text
    • https://biocoils.com/img/file/28850252091.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/49970990306.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/xatuxunuxeluxalijoteso.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210902_AB7D6A3D94083FC9.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/etnap882iv429gevuj62mlbi96/luwodawategojelav.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/zanisotizajipizawes.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/kipekegunasukidutibiwala.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/93207811070.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/zakatilipibidira.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/61894962151.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/fa2ci5o59qh50jhigqstaa9j95/bopajitijojoduzewag.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8902d93d1---35221031860.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/giwusiwegomofixitadasama.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/7b72248fcfdc0771cde4ed6aa010d6ab/91185698638.pdfIn PDF document text
    • http://sam-global.ch/files/file/jolejizumupo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/jcssa2p17s8i2lj4lv5a1tau55/kimulitevigaxuvi.pdfIn PDF document text
    • http://abpaluso.com/upload/file/69182260906.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/fipukefix.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b14786aa5---woforimizosuporanum.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27a09fe3f---kibepetotebonifi.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/52631655786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ag+spray+poultry+house+washer+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FB 10888 bytes
SHA-256: 0fa3e2feee6d3aed04ee1d6cc54aeef3a24c971e9fbd63befb0e15da69b1ce97
font_02_sfnt_off0000e325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 16828 bytes
SHA-256: 4bde27d3455a5af9e9a2285edec5ba01827c9ef2b53a963a0e146ba4311981ab

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