Malicious PDF — malware analysis report

Static analysis result for SHA-256 abccd817fc7722f3…

MALICIOUS

PDF

82.5 KB Created: 2021-04-04 18:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 73234026fc014436d94fcb65568cbd1f SHA-1: aad83afc0ee04c1857f8fad5b95f1c979838b921 SHA-256: abccd817fc7722f35566fdf36d25dd20ee6e87b64ffc43b0d465b0ace514625f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the use of embedded JavaScript for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=arc+length-sector+area+wells+worksheet+%2528w2%2529 PDF link annotation
    • https://xuzijobozu.weebly.com/uploads/1/3/1/4/131411245/rewuwoju_fagawalef_lenisoxes.pdfIn PDF document text
    • https://cdn.sqhk.co/fudopalizew/gjiVgcK/vifiru.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/eME5GJd/38159387922.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/jivuje_zenarulod.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/Y9jh9id/86820775034.pdfIn PDF document text
    • http://putijeku.22web.org/canon_eos_rebel_t5i_manual_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_bd7bcb445f4e4e89ba269d6e2934e409.pdf?index=trueIn PDF document text
    • http://duwimufowewis.epizy.com/the_good_the_bad_and_the_ugly_sheet_music_orchestra.pdfIn PDF document text
    • http://xugibomexepef.rf.gd/2018_sea_doo_rxt_x_300_service_manual.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_0784b090c2c2492ebd0229bd2958733c.pdf?index=trueIn PDF document text
    • http://mopuminamopox.epizy.com/31888396249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943e5676-3fac-4b43-b5f2-a42fd418f6e6/how_many_calories_in_a_large_chili_cheese_tots_from_sonic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6655c3a3-95f3-44bc-aabf-464cd176ac5a/turnigy_9x_compatible_receivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3a91ba-4409-4c84-b803-3c1026ad4e70/xuwinodita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5936ad9-c3f1-4f52-acd7-fc544982b15e/hp_envy_4500_ink_cartridge_stuck.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E7 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off0000e3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AA 2864 bytes
SHA-256: feb7b0a231daa5869376ede745e3710e8328e703e54e7a1fa61048461e3e1f84
font_02_sfnt_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 5524 bytes
SHA-256: 7da387fa815ed10bacd09df029df045600567c99239a1fe4bb7e995ab5bf6175
font_03_sfnt_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 11116 bytes
SHA-256: 503015feb9a5f9b1c78ddcf5abf89458e2824824568962cac66a9b6104490653
font_04_sfnt_off00012694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12694 16172 bytes
SHA-256: 33cbbabcb9c0313c14708adc1c9e6739c0fce993425c6db46a8bb2e3db34ad9b