Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ec5fc90b0a6364…

MALICIOUS

PDF

94.8 KB Created: 2021-06-26 15:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e0cd6aea9adbca34af41a84322af9640 SHA-1: 6485a555e3fdcc623407e1bca0f7b9e9361fa9c1 SHA-256: b1ec5fc90b0a6364f2c0b7eb2e108ecaac47fd7775229a3d39bf6f58faabc539
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and URL patterns suggest it's designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://utuin.net/files/fckeditor/file/tigafexaburalupifijulaxir.pdf In PDF document text
    • https://ratsimae.ee/media/contents/file/xisibuzirozewovapowiwu.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/41dccadf5a283595d1857c76cd9de5ab/fatesimolinoxiwaruveme.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/f947aa40025f8da62eaf98c0b5395ca7/43398815373.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/11851579805.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beeb87994c8---47209199256.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/68669768201.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/0cb74705ea90357ddf59d219bc0ce090/14601277158.pdfIn PDF document text
    • https://agatanorek.com/files/file/wususubafoxitirizuro.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1f8be770ae5489a84d7db1a8ac767c67/bataluwuxafifafidi.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7412331a84---mukejonofawunolujipakagi.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dae09d0f5---wefusudafakazo.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2b98deb34---wezoleju.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/doniwurefugele.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/is3tddmcf04s1ulokjcuibe9th/22240332693.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/6975844888.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e384f63a5b---88689652454.pdfIn PDF document text
    • http://digifast.cz/userfiles/pikiloxapuwetafolej.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2466065c2---56750468481.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160743c9e9567f---97751367519.pdfIn PDF document text
    • http://chouchoudauphongongtay.com/upload/ck/files/21966619738.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c587fee7ddca8d0f2f212c52622c6c0d/11171133338.pdfIn PDF document text
    • https://landi-bg.com/images/file/99294301184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=sample+paper+of+sst+class+10+2020PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 10812 bytes
SHA-256: 6b15ff8de29c3c698b111447b17694083e3e972786186e12e0a822374b9ec46a
font_01_sfnt_off00010e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E45 17124 bytes
SHA-256: 4cbc8b11e69bcdbfea7e7ad726bb1056ae295ba3e4c25caaaf65271bb96d7426
font_02_sfnt_off00012627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12627 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E39 17384 bytes
SHA-256: 305ad844e5e76b615a9665e5c358a6a88fb0b500a4fb01d5500b0c2e4e5838e8

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