Malicious PDF — malware analysis report

Static analysis result for SHA-256 8121c26822ec0ae2…

MALICIOUS

PDF

79.2 KB Created: 2021-03-05 12:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 69ad33a777a88d0619863176544c9ff8 SHA-1: 560b3d88d229744fc112e148873d678c43cfc0bd SHA-256: 8121c26822ec0ae29a81d1dbb3f229303d8f2305fd1f10070c14b5dbbab6ca54
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a significant number of embedded links, with several pointing to known redirector infrastructure and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection further supports its classification as a phishing trojan.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=lakshmi+ashtakam+lyrics+in+english+with+meaning In PDF document text
    • http://gatorama.fun/losuk2qs0e.pdfIn PDF document text
    • http://com-signto6.xyz/dipuramipodidajugikosredvd.pdfIn PDF document text
    • https://kaxudafesin.weebly.com/uploads/1/3/4/3/134355678/detipazomoleta.pdfIn PDF document text
    • http://magnitoli-2ekran.site/texas_instruments_ti-84_plus_not_turning_onter0k.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/74115982430.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/8587843.pdfIn PDF document text
    • https://bapudemajupi.weebly.com/uploads/1/3/1/4/131438294/333ef3dbef99d0.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/daxaluraresapij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/eacb654a-a34d-4ac2-acc6-1e7adeb76f78/cricut_expression_2_connect_to_internet.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_d0310825fb674568be7d7532c57fee58.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37defa4d-280a-43f9-a24b-63b2b6c0cbe6/kimutabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688ef080-ada5-474b-b949-c50df8729833/57349300211.pdfIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_5bdff726234042e982c9cc4fc217be8d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29693aa-fc11-4ce6-9914-16843426b2f8/68651818218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d30656ae-f2c2-4421-a0e6-730c6846800d/what_are_the_mudras_in_yoga.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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 5412 bytes
SHA-256: bcb7d1c46f1736701352c4a0bb36c4b55c0fb2c02b40e3490cb094f0007970e5
font_01_sfnt_off0000f13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 2140 bytes
SHA-256: 4707bf859c2b2b552e51fb2091ad8c8f9f3049b019adc279754ac00abd2d80ce
font_02_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 3772 bytes
SHA-256: de4bb0152be9e9bb118c80499050ee62e021374f1164eebab4c7006309812440
font_03_sfnt_off0001064f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064F 12444 bytes
SHA-256: c7aca4ba7a96c856c48ac008d2d58acaf803636c96bc3d7b48838d96384e7db6