Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d483ca33b6ade6…

MALICIOUS

PDF

153.5 KB Created: 2021-05-23 07:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4fc124991528b3670a21d73d30a59d77 SHA-1: d0bc558cc3a2a88712510809a11502749b21e601 SHA-256: b5d483ca33b6ade63e7dbb4d2e88bba3ab0e8acd7cbad2ffc587935e19110c0e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The embedded URL `https://ponafet.ru/strik?utm_term=shri+durga+saptashati+in+marathi+pdf+download` suggests a lure for users searching for specific content, aiming to redirect them to a malicious site. The presence of numerous other embedded URLs further supports the link farm and redirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=shri+durga+saptashati+in+marathi+pdf+download PDF link annotation
    • https://banatili.weebly.com/uploads/1/3/5/3/135314160/sixuruw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491946/normal_6033d5d2bdce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_601ca815f0f70.pdfIn PDF document text
    • https://jajixawu.weebly.com/uploads/1/3/5/9/135992574/4506146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365562/normal_5fff12ce9f3f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_6026bdf0ab679.pdfIn PDF document text
    • https://donasidavojixa.weebly.com/uploads/1/3/4/4/134494786/zumofikiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_5fdabcaf56bb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450151/normal_6040af5385399.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_6037e26a7e1f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404512/normal_6019cd079e1ec.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/2021864.pdfIn PDF document text
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/9cc068d3.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
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6aca06-3379-4bbf-8d2b-4ef81ba76872/schlage_deadbolt_key_spins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5907c17d-3c38-467b-9724-34169a8cf5d0/87085939670.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/pisogow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89246773-d72c-4c4c-8441-4f1d711db168/tasco_trail_camera_review.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/10785942444.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
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C46A 5648 bytes
SHA-256: 25482a6bf751bf70061e33c3b8bb641836afed68ebb5e59f68d376f1f5ddf8ea
font_01_sfnt_off0001d787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D787 3740 bytes
SHA-256: eb903a4bcabb0673128613fc2c6a3b3be6b6be0204d11159aa2f590e1d82ee93
font_02_sfnt_off0001e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2F8 4820 bytes
SHA-256: f3e5403e201cb4aabba4862e9d17066d78d8c70691ea1ba4a98ac01fb06a352c
font_03_sfnt_off0001f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F18F 3912 bytes
SHA-256: 62a6722e0a7780ce92c38fa958df9f2a9949d21e8884ca563b6443ce5db754b1
font_04_sfnt_off000200e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x200E3 7432 bytes
SHA-256: 0ba5b55b68d1ce0bcf15369e2405b260a62fb0d5cd784e16871619b6e78f9a0a
font_05_sfnt_off0002156a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2156A 15512 bytes
SHA-256: e6da740d8c4269fdf512102ecc9f7a4773723c30e41e9fb075f2f9aed6a89a4c
font_06_sfnt_off00024349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24349 4592 bytes
SHA-256: be217960a7a9df76e1bb633ade7456b961bb627b088bc0efbc30c09f9d6a0997

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